S8 Gen4 Series

Android Car Stereo User Manual 

For SKUs below:

Universal Android Head Unit Double-DIN: S84G2B7P, S84G2D7P

Versatile Android Head Unit Double-DIN: S84G209P, S84G211P, S84G225P, and S84G215PB

Model Notice:

If your device is labeled as A7 while this manual uses S8 Gen4 model names, please refer to the model mapping below.

After a product platform upgrade, the A7 series was incorporated into the S8 Gen4 series. As a result, the corresponding models are now identified under the S8 Gen4 naming system in this manual.

A7 models and their corresponding S8 Gen4 models refer to the same products covered by this manual.

Model Mapping:

A7G2B7PKL → S84G2B7P

A7G2D7PKL → S84G2D7PB

A7G209PKL → S84G209P

A7G211PKL → S84G211P

A7G225PKL → S84G225P

Preface

Thank you for choosing ATOTO

As an innovative brand with a decade of dedicated expertise in automotive electronics, ATOTO upholds the core philosophy of "Different. Better. Trusted". We seamlessly integrate professional audio-visual technology and user-friendly interactive features to elevate every journey with refreshing experiences.

• Different – We deliver products that stand apart through thoughtful design, innovation, and user‑oriented features.
• Better – We integrate professional audio‑visual technology with intuitive interaction to elevate every journey with superior experiences at an accessible price.
• Trusted – Endorsed by millions of users worldwide, ATOTO has earned a reputation for reliable products and responsive service you can count on.

This philosophy guides everything we do—from long‑term R&D investment, to continuous product improvement, to prompt customer support. With ATOTO, you can always expect something different, something better, and above all, something trusted.

Copyright Statement

The copyright and related intellectual property rights of ATOTO brand Android head unit product manuals (including electronic and printed versions) are exclusively owned by ATOTO. Without explicit written authorization from ATOTO, no organization or individual may use the content in any form (including but not limited to copying, distributing, adapting, translating, mirroring, or reposting) for commercial purposes or provide it to third parties.

Permitted Use Scope

These manuals are provided exclusively for reference by users who have purchased genuine ATOTO Android head unit products. Users may view, store, or print the content for personal and reasonable needs, but must not remove or alter copyright notices, statements, or product information. The content shall not be used for technical support, promotion, training, or third-party service scenarios involving non-ATOTO products.

Liability Statement

ATOTO reserves the right to pursue legal action against any party for legal disputes, financial losses, or damage to brand reputation caused by unauthorized use, reproduction, modification of the manual content, or infringement of ATOTO's copyright. For cooperation authorization, content citation, or technical inquiries, please contact ATOTO through official channels (Customer Service Email: support@atotoglobal.com).

FCC Compliance Statement

The FCC Compliance Statement is an official declaration by ATOTO to users indicating that the product complies with the radio frequency interference and electromagnetic compatibility (EMC) regulations of the U.S. Federal Communications Commission (FCC). The specific statement is as follows:

This device strictly complies with all provisions of Part 15 of the FCC Rules.

Operation is subject to the following two conditions:

1.This device must not cause harmful interference;

2.This device must accept any interference received, including interference that may cause undesired operation.

Contact ATOTO Customer Support

If you encounter any issues during installation or use, our support team is ready to assist.

Email: support@atotoglobal.com

Chapter 1 Important Information

1.1 About this Manual

To ensure proper use of your new ATOTO Android head unit, please be sure to read this user manual thoroughly and understand its contents fully. Keep it in a safe place for future reference.

Important Notes

1. This manual is applicable to all ATOTO S8 Gen4 Series head unit models. Newly released S8 Gen4 models may have extra functions that are not mentioned.
2. The list of accessories and the back panel may vary slightly depending on the specific model and the region of sale, but the system, UI, and product hardware information remain consistent.
3. The screenshots in this manual may differ slightly from the actual interface of the current S8 Gen4Android head unit system, as the system is continuously optimized and enhanced through OTA updates.
4. ATOTO may release new system updates, which may include changes made or newly added functions that are not mentioned here.
5. The information in this manual may be insufficient. If you have any questions or problems concerning your unit that are not covered in this manual, consult customer support.

1.2 Operation Warnings

1.2.1 Important Safety Information to Know Before Use

To ensure your personal safety and prevent hazards such as fire, please strictly observe the following precautions, and immediately take appropriate action if any abnormal product behavior occurs

1.Avoid Short Circuits and Electric Shock

1) Do Not Place Metal Objects

• Instruction: Do not place or leave any metal objects, such as coins or metal tools, inside this product.

• Purpose: To prevent metal objects from causing a short circuit, which may damage the product.

2) Prevent Liquid Contact

• Instruction: Do not allow this product to come into contact with any liquid.

• Risks: Liquid contact may cause overheating, smoke, or other abnormal conditions, which can not only damage the product but may also cause electric shock and pose severe risks to personal safety.

3) Emergency Handling Method:

If liquid or foreign objects accidentally enter the interior of this product, do not use the product in this condition. Immediately take the following actions:

• Immediately park the vehicle in a safe location and turn off the ignition switch (ACC OFF) to cut off the power supply.

• Promptly contact ATOTO Customer Service or your dealer for professional assistance.

2.Immediate Action Required for Product Abnormalities:

1) Do not use the product if any abnormalities occur, as continuing to use it may result in product malfunction, permanent damage, fire, or even endanger personal safety.

2) If the product has the following abnormalities, please take immediate action:

• Description of Abnormalities: If the product emits smoke, unusual sounds, or odors, or if the screen displays abnormally, etc.

• Handling Method: Immediately turn off the power and consult ATOTO Customer Service or your dealer for assistance.

1.2.2 Important Safety Information for Critical Driving Instructions

To ensure your personal safety, please read and thoroughly understand the following important safe driving instructions before using this product.

1. Compliant Driving:Always follow safe driving practices and comply with all applicable traffic regulations. If you encounter difficulties while operating this product, pull over to a safe location, park your vehicle securely, and engage the parking brake before making any necessary adjustments.
2. Stay Focused While Driving: Always keep your full attention on the road while driving. Do not stare at the device screen or operate the entertainment system. If you need to make any adjustments, pull over safely and ensure the vehicle is completely stopped before proceeding.
3. Be aware of Road Conditions: Avoid operating this product under hazardous road conditions and comply with regulations displayed on the map information. Always adhere to traffic restrictions and actual road conditions while driving.
4. Operating the Product while Driving is Dangerous: If you need to operate any function for an extended period, stop the vehicle completely and ensure it is in a safe location before doing so.
5. Operate at Safe Volume Levels: Excessive volume may prevent you from hearing emergency vehicle sirens or road warning signals, posing a safety risk and possibly leading to accidents. High volume may also result in hearing loss.
6. Do Not Watch Videos While Driving: Do not watch or operate video functions while driving, as this seriously distracts the driver and may result in accidents. The manufacturer shall not be liable for any personal injury, property loss, or damage resulting from distracted operation of video functions while driving.
7. Minimize Operation While Driving: Do not enter text, adjust settings, or operate other navigation system functions while driving. These operations should only be performed when the vehicle is safely and legally parked.
8. Environmental Conditions:Please pay attention to environmental temperatures. Using the navigation system under extremely high or low temperatures may result in malfunctions or damage. In addition, the product may be damaged by severe vibrations, metal objects, physical impact, or water ingress.
9. Avoid Battery Drain: When using this product, please ensure that the vehicle engine is running. Using this product without starting the engine may drain the vehicle’s battery. Do not install this product in vehicles without an ACC circuit or power line.

1.3 Screen Use and Maintenance

This product uses a capacitive touchscreen, similar to those used in mobile devices (such as smartphones). Please use and maintain this product as you would a mobile device.

1.3.1 Capacitive Touchscreen User Guide

• Do Not Operate the Screen with Wet Fingers: If your fingers are wet or sweaty, the touch function may not operate properly.
• Avoid prolonged exposure to sunlight: Do not leave the screen exposed to direct sunlight when not in use, as extended exposure to high temperatures may cause screen malfunction or permanent damage.
• Avoid Pressing the Screen with Excessive Force: To avoid screen damage, operate the touchscreen keys with gentle finger touches only.
• Avoid Contact with Sharp Objects: Do not use ballpoint pens or other sharp objects to operate the screen to prevent damage.

1.3.2 Screen Cleaning Instructions

1. If there is dirt on the device screen or panel, wipe the surface with a dry, soft cloth (such as a silicone cloth).
2. For stubborn stains, use a cloth moistened with a neutral detergent to clean the screen and panel, then wipe dry with a soft, dry cloth.
3. It is best to clean the screen when the device is powered off, cooled down, and not exposed to direct sunlight.

Notes:

1. Do not use ammonia, glass cleaners, or any types of household chemicals to clean the screen and panel. Never use abrasive cleaners.
2. Do not spray cleaners directly onto the screen or panel to avoid damaging internal components.
3. Avoid using hard cloths or volatile liquids (such as thinners or alcohol) to clean the screen and panel as these may scratch the surface or erase printed text.

1.4 Notice

Apple CarPlay is a trademark of Apple Inc.

• iPhone® is a trademark of Apple Inc., registered in the U.S. and other countries.
• Use of the Apple CarPlay logo means that this user interface meets Apple performance standards.
• Apple is not responsible for the operation of this device or its compliance with safety and regulatory standards.
• ATOTO are not affiliated with Apple Inc.

Android Auto is a trademark of Google LLC.

The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by ATOTO are under license. Other trademarks and trade names are those of their respective owners.

1.5 Optional Accessories

The S8 Gen4 supports various external accessories used for information display, vehicle status monitoring, camera expansion, interior lighting enhancement, and audio system expansion.

Compatible accessories may be updated or expanded in future product releases.

The following lists categorize currently supported accessories by type for reference.

Note: The accessories listed below are optional. Most accessories are sold separately, depending on the specific package and SKU.

Interactive LED Sign

Used for external messaging, emojis, and interactive display.

The S8 Gen4 Series supports the following models:

• CI-IALD13 (13.5" AI Interactive LED Sign)
• CI-IALD19 (19" AI Interactive LED Sign)
• CI-VIALD13 (13.5" AI Interactive LED Sign)
• CI-VIALD19 (19" AI Interactive LED Sign)
• INT21A (21" Premium Bluetooth LED Message Sign)
• INT21B (21" Premium Bluetooth LED Message Sign)

Ambient Lighting Accessories

Used for interior ambient lighting and footwell illumination inside the vehicle.

The S8 Gen4 Series supports the following models:

• AL-ILS150-150(Car Interior Ambient Light)
• AL-ILS60-100(Car Interior Footwell Light)
• CI-FLT01(Car Interior Footwell Light)

Vehicle Monitoring Accessories

Used for monitoring vehicle status and safety-related data.

The S8 Gen4 Series supports the following models:

• AC-4450 (Bluetooth OBD II Diagnostic Scanner)
• AC-UTP1 (Tire Pressure Monitoring System, TPMS)

Smart LED Light

Used for off-road driving, work lighting, and high-intensity exterior illumination.

The S8 Gen4 Series supports the following models:

• AL-4IN6-18W
• AL-8IN20-120W
• AL-12IN24-72W
• AL-F14-18W
• AL-4_5O14-42W
• AL-F14-36W

Vehicle Sunshade

Used to reduce sunlight exposure and improve in-vehicle comfort.

The S8 Gen4 Series supports the following models:

• AL-ZYZS01 (Smart Sunshade)

Steer Wheel Control Accessories

The S8 Gen4 Series supports the following models:

• AC-44F8 Wireless Remote
• AC-44F20 Wireless Remote Control

Camera Accessories

The S8 Gen4 Series supports the following models:

• AC-HD01LR (720P Backup Camera)
• AC-HD02LR (720P Backup Camera)
• WR2-12HDLR (Wireless Vehicle Camera System)
• AC-HN9CBV2 (In-Cabin Rear Camera)
• AC-HN9FR (Front Camera)

Other Accessories

The S8 Gen4 Series supports the following models:

• AC-MIC20 (External Microphone)

Chapter 2 Physical Hardware Overview

For SKUs below:

Universal Android Head Unit Double-DIN: S84G2B7P, S84G2D7PB

Versatile Android Head Unit Double-DIN: S84G209P, S84G211P, and S84G225P

2.1 Front Panel Overview

2.1.1 Front Panel Overview — S84G209P & S84G211P (Full Touch Button Panel)

The front panel of the head unit contains two built-in microphones, which ensure clearer voice pickup for hands-free calls, voice commands, and voice assistant interaction.

Dual Noise-Canceling Microphone

2.1.2 Front Panel Overview — S84G2B7P

【AI图解：This image shows the front panel button layout of the S84G2B7P. The buttons are located on the left side of the screen, arranged vertically from top to bottom. Items 1–7 correspond to the physical order.】

Front Panel Button Position Reference:

On S84G2B7P, the front panel touch buttons and interfaces are located on the left side of the screen, arranged from top to bottom. Items 1–7 below correspond to this physical order.

S84G2B7P Front Panel Touch Buttons & Interfaces

1. MIC (Microphone Port): Ensure clearer voice pickup for hands-free calls, voice commands, and voice assistant interaction
2. Screen Power Button (⏻): Long press: turn screen off/on; or long press to turn off screen / short press to turn on screen.
3. Home Button: Quickly return to the home screen interface for easy switching.
4. Volume Up (+) Button: Short press to increase system volume.
5. Volume Down (-) Button: Short press to decrease system volume.
6. Voice Assistant Button: Long press to activate the voice assistant (Google Assistant / ATOTO DriveChat Voice Assistant).
7. RST (Reset Hole): Gently press with a paperclip or similar tool to force restart the system in case of a freeze or abnormal operation.

2.1.3 Front Panel Overview — S84G2D7PB

【AI图解：This image shows the front panel layout of the S84G2D7P. The buttons and interfaces are arranged in two areas. On the left side, items 1–4 are positioned vertically from top to bottom. Along the bottom edge, items 5–9 are arranged horizontally from left to right. Item 10 refers to the built-in microphones, MIC1 and MIC2, which work together for voice input.】

Front Panel Button Position Reference:

On S84G2D7P, the front panel buttons and interfaces are arranged in two areas:

Left side (vertical): Items 1–4 are located on the left side of the screen, arranged from top to bottom.

Bottom side (horizontal): Items 5–9 are located along the bottom edge of the screen, arranged from left to right. Item 10 refers to the built-in microphones, including MIC1 and MIC2, which work together for voice input.

S84G2D7P Front Panel Buttons & Interfaces

Left Side Interfaces:

1. RST (Reset Hole): Use a paperclip to press gently for a forced system restart when frozen.

2. MicroSD Card Slot: For expandable storage, supports music, video, and multimedia file storage.

3. SIM Card Slot: Insert a 4G Nano SIM card for network access, navigation, online music, and more.

4. USB Port: Connect USB flash drives / external hard drives, or attach expansion accessories.

Bottom Side Physical Buttons & Interfaces

5. Screen Power / Mute Button (⏻ / Mute): Short press to mute/unmute; long press: turn screen off/on; or long press to turn off screen / short press to turn on screen.

6. Navigation：Switch the mode of ambient lighting.

7. Home / Voice Assistant Button: Short press to quickly return to the home screen interface for easy switching; long press to activate the voice assistant (Google Assistant / ATOTO Voice Assistant).

8. Volume Down (−) Button: Short press to decrease system volume.

9. Volume Up (+) Button: Short press to increase system volume.

MIC (Buil-in Microphone): Built-in microphone for voice calls and voice command input.

Built-in music-synced ambient lighting(Right-Side)：Adds rhythmic, flowing light modes to match your drive

2.1.4 Front Panel Overview — S84G225P

Built-in music-synced ambient lighting(Dual-Side)：Adds rhythmic, flowing light modes to match your drive

2.1.5 Front Panel Overview — S84G215PB

S84G215PB Front Panel Knobs & Interfaces:

MIC (Microphone Port): Ensure clearer voice pickup for hands-free calls, voice commands, and voice assistant interaction.

RST (Reset Hole): Gently press with a paperclip or similar tool to force restart the system in case of a freeze or abnormal operation.

Left Knob:

Short press: mute or unmute the audio.

Long press: turn off the screen.

Rotate left: decrease the system volume.

Rotate right: increase the system volume.

Right Knob:

Short press: activate the voice assistant.

Rotate left: switch to the previous track.

Rotate right: switch to the next track.

Note: The bottom light bar between the two rotary knobs is a fixed blue ambient light. It is controlled by the vehicle illumination/headlight signal.

2.2 Rear Panel Ports (S8 Gen4 Versatile/Universal Android Head Unit)

Note: The rear port layout image is for reference only. Some units, such as certain 7-inch models, may not include the rear 4G SIM interface. Please refer to the actual unit received.

【AI图解：This image shows the rear panel port layout of the S8 Gen4 Series head unit, viewed from the rear. When facing the back of the unit, all ports are arranged from left to right and labeled with printed markings. On the far left, a vertical row of four round ports is arranged from top to bottom: FM-ANT, MIC, GPS-ANT, and 4G-ANT. To the right of this row, two digital audio output ports are positioned vertically: SPDIF above COAXIAL. In the center area, six rectangular multi-pin connector sockets are aligned horizontally from left to right: 10-pin, 6-pin, 4-pin, 8-pin, 12-pin, and 20-pin, supporting camera inputs, USB ports, audio outputs, SIM, auxiliary inputs, and amplifier control. On the far right, a 16-pin main power harness connector provides power input, ignition, ground, speaker outputs, and vehicle signal connections.】

Rear Panel Port Layout Reference (Viewed from the Rear):

When facing the rear of the unit, all ports on the S8 Gen4 Series head unit are arranged from left to right. All connectors are labeled with printed markings (silkscreen) on the rear panel for identification.

1. Far Left: Round Antenna & Audio Ports (Top to Bottom)

On the far left side of the rear panel, there is a vertical row of four round ports, arranged from top to bottom as follows:

FM-ANT – FM radio antenna input

MIC – External microphone input

GPS-ANT – GPS antenna input

4G-ANT – 4G cellular antenna input

At approximately three-quarters of the panel height to the right of this column, two digital audio output ports are located vertically:

SPDIF – Square optical SPDIF digital audio output

COAXIAL – Coaxial digital audio output (located below SPDIF)

2. Center Area: Multi-Pin Connector Sockets (Left to Right)

To the right of the FM-ANT area, there are six rectangular multi-pin connector sockets arranged horizontally.

From left to right, they are:

① 10-pin connector

Functions include: Backup CAM Input

Bluetooth Antenna

Brake Detection

Wi-Fi Antenna

② 6-pin connector

Functions include: USB2 and USB3

③ 4-pin connector

Function: USB1 (for DVR recording or external storage)

④ 8-pin connector

Functions include: Rear Left Audio Out (RL)

Rear Right Audio Out (RR)

⑤ 12-pin connector

Functions include: Front DVR Camera (optional)

In-Car Camera (optional)

⑥ 20-pin connector

Functions include:

4G SIM

Subwoofer Out (SUB)

Video Input (VIN)

Left Channel Auxiliary Input (LIN)

Right Channel Auxiliary Input (RIN)

Front Right Audio Out (FR)

Front Left Audio Out (FL)

Amplifier Turn-on (+)

3. Far Right: Main Power Harness Connector

On the far right side of the rear panel, there is a 16-pin main power harness connector.

This bundled connector is used for:

Main power input

Ignition signal

Ground

Speaker outputs

Steering wheel control and other connections

This connector serves as the primary wiring interface between the head unit and the vehicle.

Rear Panel Connection Ports (Applicable to S84G2B7P, S84G2D7P,S84G209P, S84G211P, and S84G225P)

The purposes and usage instructions for these ports are as follows:

Backup CAM Input

Purpose: Receives video signals from the rear-view camera for display on the head unit screen.

Bluetooth Antenna

Purpose: Connects Bluetooth antenna.

Brake Detection

Purpose: This wire is used to detect whether the vehicle’s parking/hand brake is applied. When correctly connected, the system will disable video playback while the vehicle is in motion. If your vehicle’s factory harness does not have a parking-brake wire, leave this wire unconnected

Wi-Fi Antenna

Purpose: Connects Wi-Fi antenna.

FM - ANT-Radio Antenna Input

Purpose: Connects a radio antenna for FM signal reception.

MIC - Microphone Input

Purpose: Connects an external microphone to improve voice input quality.

GPS-ANT

Purpose: Connects GPS antenna.

4G-ANT

Purpose: Connects 4G mobile network antenna.

COAXIAL - Coaxial Output

Purpose: Outputs digital audio signals through a coaxial connection to compatible external audio equipment.

SPDIF - Optical SPDIF Output

Purpose: Provides digital audio output to compatible devices.

USB1 (for DVR or External Storage)

Purpose: Dedicated storage interface for dash cam recording or External Storage

USB2

Purpose: General-purpose external storage expansion.

USB3

Purpose: General-purpose external storage expansion.

Rear Left Audio Out (RL)

Purpose: Outputs audio to the left rear speaker.

Rear Right Audio Out (RR)

Purpose: Outputs audio to the right rear speaker.

Front DVR Camera (optional)

Purpose: Used to connect the signal from a front or rear recording camera to enable video recording.

In-Car Camera (optional)

Purpose: Receives video signals from the In-Car camera for display on the head unit screen.

4G SIM

Purpose: Used to enable cellular network functionality (requires inserting a SIM card)

Subwoofer Out (SUB)

Purpose: Outputs low-frequency audio signals to the channel of an external subwoofer.

Video Input (VIN)

Purpose: Receives video signals from an external video source (e.g., DVD player, TV box) for playback on the head unit.

Left Channel Auxiliary Input(LIN)

Purpose: Receives left-channel audio input from an external device via the AUX-IN connection.

Right Channel Auxiliary Input(RIN)

Purpose: Receives right-channel audio input from an external device via the AUX-IN connection.

Front Right Audio Out (FR)

Purpose: Outputs audio to the right front speaker.

Front Left Audio Out (FL)

Purpose: Outputs audio to the left front speaker.

Amplifier Turn-on(+)

Purpose: This wire provides a +12 V remote turn-on signal for an external amplifier. It becomes active when the head unit is powered on (usually when the ignition is switched on)

Power 15A Port

Purpose: The POWER 15A port is the primary power input for the S8 Gen4 car stereo. It delivers the necessary power to the unit and ensures stable operation.

DAB-ANT Port (Optional)

Note: DAB+ functionality is only available in Europe, Australia, and the UK, not in other regions

Purpose: Connects to the external DAB+ antenna accessory for receiving digital radio broadcasts.

Special Note:

DAB-ANT Port: This interface is available on models with a built-in DAB module (e.g., S8 Gen4DG2B7PKL, indicated by the letter “D” in the model name). It connects to an external DAB antenna via a Fakra connector, enabling the reception of digital audio broadcast signals.

For models without a built-in DAB module, the DAB-ANT port is not present. However, users can still receive digital audio broadcast signals by connecting the ATOTO AC-4475 DAB+ receiver (sold separately) to the USB port of the S8 Gen4 Android head unit.

Chapter 3 Home Screen & UI Operation

This chapter explains the S8 Gen4 home screen layout, customizable components, multi-window capabilities, and how to navigate the core interface. A well-organized interface gives users quick access to music, navigation, calls, and apps—creating a safer and smoother experience.

Home Screen Layout

【AI图解：This image shows the S8 Gen4 Home Screen Layout. The screen is divided into four functional areas: the Status Bar at the top, the Widget Area on the left, the Main Display Area on the right, and the Shortcut Bar at the bottom. The Status Bar displays volume, network status, and time, and supports swipe-down access to quick settings and notifications. The Widget Area supports up to three customizable widgets such as navigation, music, weather, Bluetooth status, or vehicle information. The Shortcut Bar provides customizable quick-access icons for apps and system functions. The App Drawer is represented by a grid icon on the Shortcut Bar, which opens the full app list when tapped.】

3.1 Home Screen

The Home Screen (User Interface) consists of four functional areas: the status bar on top, the widget window area on left, the Display Area on right, the Shortcut Bar on bottom.

3.1.1 Status Bar (at the Top Right of the User Interface)

This area displays essential indicators such as volume, network state and time.

Note: By default, swiping down the status bar opens the Quick Setting Panel(on left) and message notification(on right).

3.1.2 Widget Area (Customizable Display Widget)

This area can display up to 3 user-selected widgets such as, Navigation, Music Player, Weather, Bluetooth Status, Vehicle Info.

How to Change Widgets

Step 01: Long press an widget on homescreen.

Step 02: Click the "-" to delete an existing widget and select a relacement by clicking the "+" from the widget list.

Step 03: Confirm to apply by clicking the check mark on the top left corner.

3.1.3 Shorcut Bar (Customizable)

This area provides quick-access shortcuts to frequently used functions, enabling effortless system control and app launching.

How to Customize Shortcut Bar

Step 01: Long press an icon on shortcut bar.

Step 02: Click the "-" to delete an existing widget and add an app by tapping the app from app center or component center.

Step 03: Confirm to apply by clicking the "complete" button on the top right corner.

3.1.4 App Drawer (in the middle of the Shortcut Bar)

The App Drawer is an important component of the S8 Gen4 Android head unit’s home screen. It is represented by a simple and clear “grid” icon located at the bottom left corner on shortcut bar. Clicking this “grid” icon expands the App Drawer, revealing all installed apps.

3.2 Quick Settings Panel (Control Center) via Status Bar

The quick settings panel is the integrated control center. Swipe down the status bar at the top of the S8 Gen4 Android head unit’s home screen to open the Quick Settings Panel (Control Center). It provides instant adjustment for frequently used functions and mainly includes the following modules: network and connection, Bluetooth management, driving assistance settings, volume adjustment, screen brightness adjustment, etc.

Quick Settings Panel(Control Center)

【AI图解：This image shows the Quick Settings Panel (Control Center) of the S8 Gen4 Android head unit. The panel includes the following controls: Bluetooth, Wi-Fi, Mobile Network, Airplane Mode, Theme, Brightness Adjustment Slider, Volume Adjustment Slider, Display Mode (Dark Mode / Light Mode), Navigation Bar Mode (LHD / RHD), Turn Off Screen, Standby, Reboot, Screenshot, and BT Lock.】

Bluetooth: Short press: Turn Bluetooth ON/OFF. Long press: Open the Bluetooth Settings page for device management and advanced configuration

Wi-Fi: Short press: Enable/disable Wi-Fi. Long press: Open Wi-Fi Settings for network selection and detailed setup

Mobile Network: Short press: Turn mobile data ON/OFF. Long press: Open Mobile Network Settings (SIM, APN, data usage, etc.)

Airplane Mode: Short press: Enable or disable Airplane Mode. When enabled, all wireless signals including mobile data will be turned off.

Theme: Tap to open the Theme Settings page, where you can change wallpapers, fonts, themes, and screensavers.

Brightness Adjustment Slider Bar: Tap or drag to adjust the screen brightness.

Volume Adjustment Slider Bar : Tap or drag to adjust the volume.

Display Mode: Left icon: Switch to Dark Mode. Right icon: Switch to Light Mode

Navigation Bar Mode: Left icon: Left-hand drive mode (LHD UI layout). Right icon: Right-hand drive mode (RHD UI layout). Switching modes will adjust the interface layout accordingly.

Turn off the screen – Immediately turn off the display

Standby – Enter low-power standby mode

Reboot – Restart the head unit

Screenshot – Capture the current screen

BT Lock – Quick screen lock (requires the BT Lock App to be set up)

3.3 Notifications Center

Swipe down the status bar to open the notification center. It sits right beside the quick setting panel. You can view various notifications and stay informed of important information (such as incoming calls, text messages, app push notifications, etc.).

3.4 Special Note: Dynamic Sound-Reactive Ambient Lighting

In the S8 Gen4 Series, the S84G2D7P and S84G225P Android head units feature integrated dynamic sound-reactive ambient lighting on the front panel.

Note:

The S84G2D7P includes one bar-type ambient light, located on the right side of the head unit.

The S84G225P includes two bar-type ambient lights, positioned on both sides of the head unit.

【AI图解：This image shows the Dynamic Sound-Reactive Ambient Lighting system of the S8 Gen4 Android head unit. The lighting enhances in-car atmosphere with customizable colors, modes, brightness levels, and sound-reactive effects. Key functions include visual enhancement, personalized color and mode settings, night-time operation assistance, and music beat synchronization. On the S84G225P, physical buttons located on the back of the left and right ambient light modules allow independent control, including brightness adjustment (4 levels), sound-pickup sensitivity adjustment (2 levels for Beat mode), and switching between lighting modes: Static, Flow, Fade, Jump, and Beat. On the S84G2D7P, long-press the light control area to turn lighting on or off and switch between Flow, Upstream, Downstream, Fade, and Jump modes.】

Function Overview of the Dynamic Sound-Reactive Ambient Lighting

The integrated dynamic ambient lighting of the S8 Gen4 Android car head unit not only adds a dazzling visual effect to the cabin, but also responds in real time to the rhythm of the music, creating an immersive and personalized in-car atmosphere. Combining decorative appeal with practical functionality, it enhances the driving mood while providing soft, comfortable auxiliary illumination, bringing more style and enjoyment to your journey. Key Features

1. Enhanced Visual Appeal: Creates a cool, high-tech in-car atmosphere.
2. Personalized Experience: Customize light color, lighting mode, and sound-pickup sensitivity based on personal preferences or the vehicle’s interior style.
3. Night-time Operation Aid: Improves visibility of the head unit’s control area in low-light conditions for easier operation.
4. Music Rhythm Synchronization: In Beat mode, the lighting flashes in sync with the music’s rhythm, enhancing driving fun and immersion.
5. Physical Button Operation: On the back of the ambient lights on both sides of the front panel of the S84G225P, physical buttons are provided. The left and right buttons can independently control and adjust all functions of the corresponding ambient lights.

How to Control and Adjust the Dynamic Sound-Reactive Ambient Lighting Functions on S84G225P

The S84G225P has two physical buttons on the back. They allow quick and intuitive control and adjustment of all ambient lighting functions, as follows:

1. Brightness Adjustment (4 Levels)

Description: Brightness can be adjusted flexibly to provide comfortable, glare-free auxiliary lighting for the control area during night driving.

Operation: Quickly press the backlight control button 5 times in succession to switch to the next brightness level.

2. Sound-Pickup Sensitivity Adjustment (2 Levels, for Beat Mode)

Description: Adjusts the response intensity of the lighting to sound.

Operation: Quickly press the backlight control button 7 times in succession to change the sensitivity level.

3. Lighting Mode Switching (Short Press the Physical Button Once)

The system offers 5 lighting modes:

1. Static – Fixed single-color lighting; options: Blue, Green, Red, Purple.
2. Flow – Lighting colors flow continuously.
3. Fade – Smooth transitions between different colors.
4. Jump – Instant color changes between different colors, creating a dynamic effect.
5. Beat– Lighting flashes between different colors in sync with the music beat (two beat styles available:).

Note: To adjust the ambient lighting on the S84G2D7P, long-press the light control area to turn the lighting on or off, and to switch between the available lighting modes: Flow, Upstream, Downstream, Fade, and Jump.

Chapter 4 Bluetooth

Bluetooth is dedicated to mobile device connectivity (supporting simultaneous dual-phone connection for hands-free calls and music playback, as well as integrated screen lock privacy protection)

4.1 Connect to Bluetooth

4 paths to access Bluetooth

• Navigation to Home Screen Status Bar > Bluetooth Icon
• Navigation to Home Screen > App Drawer > Bluetooth app
• Navigation to Home Screen > App Drawer > BT Music
• Navigation to Home Screen > App Drawer > Car Settings > Bluetooth

How to connect to bluetooth

Step 01: On the Bluetooth panel, turn on the Bluetooth switch to enable Bluetooth.

Step 02: Enable Bluetooth on both of your phones.

Step 03: From the Available Devices list, select the Bluetooth name of your smartphone and tap it to begin pairing.

If you cannot find your device, tap the Refresh button.

Step 04: Tap Pair and confirm any prompts on your smartphone to complete the Bluetooth connection.

Step 05: Once connected, your device will appear in the Paired Devices list. You can now use the S8 Gen4 to make hands-free phone calls and play music from your smartphone.

4.2 Bluetooth Phone Call

The Bluetooth Phone feature allows the S8 Gen4 head unit to make and receive hands-free calls once paired with your smartphone. This function enhances driving safety by enabling phone operations directly from the head unit without handling the mobile device. After successful Bluetooth pairing, users can access the dialer, call history, and contacts for seamless communication.

Dialer Panel (Left Side)

The left section of the interface displays the numeric dial pad, which allows users to manually enter a phone number to place a call.

Call History & Contacts (Right Side)

You can view the list of synchronized call records and phone's contact. Directly place a call by tapping a call recored or a contact.

4.3 Bluetooth Music

The Bluetooth Music feature allows the S8 Gen4 head unit to wirelessly stream audio from a paired smartphone or other Bluetooth-enabled devices. Once connected, users can enjoy music playback directly through the vehicle’s speakers. This provides a convenient and hands-free listening experience while driving.

Background Image Icon (Top Right)

Tap the background icon to customize the Bluetooth Music interface with different background images.

DSP Icon (Top Right)

Tap the DSP icon to open the Digital Signal Processor tuning panel.

For detailed DSP operation instructions, please refer to Chapter 20 (DSP Settings).

Chapter 5 Internet Connectivity Options

The S8 Gen4 supports three different methods of accessing the Internet. Users may choose the option that best fits their needs, usage scenarios, and cost considerations:

1. Wi-Fi Connection

Connect to an external Wi-Fi network or a mobile hotspot.

1. Cellular Network (4G SIM Card)

Insert a nano-SIM card with an active data plan to access the Internet directly via the built-in 4G modem.

1. USB Tethering

Share another device’s Internet connection via a USB cable for a stable, wired connection.

5.1 Wi-Fi Connection

The S8 Gen4 Android head unit supports both 2.4 GHz and 5 GHz Wi-Fi networks.

How to Connect to Wi-Fi

Step 01: Create a Hotspot

Use your smartphone or a portable router to set up a Wi-Fi hotspot.

Step 02: Access Wi-Fi Settings

On the S8 Gen4, tap the Wi-Fi icon on the top status bar,or navigate to: Settings > Network & Internet > Internet > Wi-Fi. Turn on the Wi-Fi switch to start scanning for available networks.

Step 03: Select a Network

From the list of available networks, tap the Wi-Fi name (SSID) you want to connect to.

Step 04: Enter Password

If required, enter the correct Wi-Fi password and tap Connect.

5.2 EIOTCLUB SIM Card (4G Nano SIM Card)

The S8 Gen4 Android head unit provides the cellular network through the built-in 4G Nano SIM card’s mobile data connection. This option is ideal for Wi-Fi-free environments.

Note: The S8 Gen4 supports two ways to stay connected over 4G cellular networks:

Physical SIM Card: Insert the included EIOTCLUB SIM card, or use your own IoT SIM card from a compatible carrier.

Users are free to choose either option. The included SIM card is provided for convenience, but not mandatory for S8 Gen4's connectivity.

EIOTCLUB SIM Service Disclaimer

EIOTCLUB IoT DATA SIM CARD and its related applications and services are independently provided by EIOTCLUB TECHNOLOGY CO., LIMITED.

ATOTO is not involved in the development, operation, or any commercial activities of this application or its associated services.

All fees, data plans, service agreements, and service quality related to this offering are solely provided and managed by EIOTCLUB TECHNOLOGY CO., LIMITED.

ATOTO and the manufacturer of the S8 Gen4 Android head unit assume no responsibility for this service. A single Nano SIM card is included in the S8 Gen4 package, and the S8 Gen4 system only provides compatibility support for the related application, allowing users to decide independently whether to use it.

If you encounter functional issues, plan subscriptions, payment problems, or service quality concerns during use, please contact EIOTCLUB's service provider directly.

Please Note: All subscriptions, network connectivity, plan purchases, service terms, and other aspects of the EIOTCLUB IoT DATA SIM CARD and its related applications and services are entirely under the ownership of EIOTCLUB TECHNOLOGY CO., LIMITED. There is no equity, partnership, or commercial cooperation between ATOTO, the developer or manufacturer of the S8 Gen4 Android head unit, and EIOTCLUB TECHNOLOGY CO., LIMITED.

Use of this service is entirely at the user's sole discretion. ATOTO, as the provider of the technical platform, does not assume any direct or indirect liability for connection failures, plan disputes, or privacy breaches resulting from third-party services.

Prerequisites & Important Notes:

1. SIM Card Type: S8 Gen4 uses a Nano SIM card.
2. Data Plan: You need an active cellular data plan from a compatible local carrier for the Nano SIM card.
3. Activation: Ensure the Nano SIM card is activated by your carrier and tested in another device (like a phone) before inserting it into the S8 Gen4 Android head unit.
4. PIN Code: If your SIM card has a PIN code, deactivate it on a phone before installing it in the head unit, as the head unit cannot perform this operation.
5. Insertion: Insert the Nano SIM card into the S8 Gen4's SIM slot in the correct orientation BEFORE powering on the head unit.
6. Compatibility: Some carriers might be incompatible with the S8 Gen4's IMEI (e.g., known issues with some VERIZON SIMs in certain regions). Check carrier compatibility if possible.
7. IoT SIM card needed: Ensure you use an IoT SIM card. Compared to regular SIM cards, an IoT SIM card offers optimized data communication and enhanced network stability. The IoT SIM card is for data only; calls and SMS are not supported.

How to Enable Mobile Network

Step 01: Insert 4G Nano SIM Card:

Power off the S8 Gen4 Android head unit, insert the activated and PIN-disabled 4G Nano SIM card correctly, then power the S8 Gen4 Android head unit back on.

Step 02: Access SIMs.

Go to Settings > Network & internet > SIMs

Note: If no SIM card is inserted, the icon will appear gray, indicating that the SIM card settings menu cannot be accessed.

Step 03: Enable Mobile Data

On the Mobile Network page, Toggle the Mobile Data switch to ON to enable mobile data. Toggle Roaming to ON if roaming is required. Once enabled, signal strength indicators will appear in the status bar.

How to Enable Mobile Hotspot (Sharing S8 Gen4's Mobile Data Connection):

The S8 Gen4 can act as a WiFi hotspot when an activated 4G Nano SIM is inserted.

Step 01: Access Hotspot Settings:

Navigate to Settings > Network & Internet > Hotspot & tethering > Wi-Fi hotspot.

Step 02: Enable Hotspot

Turn on the toggle switch to create Wi-Fi hotspot via the S8 Gen4's mobile data connection. Configure the hotspot name (SSID) and password here.

Important Notes (Mobile Internet): Network Frequency Band

1. Please check with your carrier whether the following frequency bands are supported.

· About the Network Frequency Band

• 2G(Network Generation) :GSM850, GSM900, GSM1800, GSM1900
• 3G WCDMA(Network Generation) : B2, B4, B5, B8
• 4G(Network Generation) : B2, B4, B5, B7, B8, B12, B13, B17, B19, B25, B26, B38, B39, B40, B41, B66

1. S8 Gen4 Android head unit requires these specific bands to access the network. Additionally, network access for car head units depends on the coverage of the operator's base stations in the area.
2. Despite GSMA certification, some carriers may not be compatible with head unit's IMEI（The VERIZON SIM card has been confirmed to have compatibility issues).
3. For LTE band information, check Wikipedia's LTE frequency bands page. (https://en.wikipedia.org/wiki/LTE_frequency_bands)
4. Monitor S8 Gen4 Android head unit data usage via your carrier's website or app, as there's no call function. SMS verification can be received by the head unit's built-in Message app.

Chapter 6 CarPlay/Android Auto/Mirror(ZLINK)

6.1 ZLINK

This chapter introduces how to use Wireless CarPlay, Wireless Android Auto, and Screen Mirroring through the ZLINK application. ZLINK provides seamless integration between your smartphone and the S8 Gen4 Android head unit, enabling convenient access to navigation, calls, messages, media apps, and voice assistants in a safer and more driver-friendly environment.

Key Features:

1. Dual Platform Compatibility: supports both Apple CarPlay (for iPhone) and Android Auto (for Android smartphones).
2. Wireless Connectivity: connects via Wi-Fi + Bluetooth, eliminating the need for physical cables.
3. Rich App Support: projects supported apps—such as Apple Maps, Google Maps, Spotify, Apple Music, Phone, Messages, and voice assistants (Siri/Google Assistant)—to the S8 Gen4 head unit.
4. Voice Control Support: allows hands-free control using voice commands such as “Hey Siri” or “Hey Google.”
5. Native Touchscreen Control:fully compatible with the S8 Gen4 touchscreen for smooth, intuitive interaction.

Preparation Requirements:Before use, ensure that both your smartphone and the S8 Gen4 head unit have been updated to versions that support Apple CarPlay or Android Auto.

How to access ZLINK:

Navigate to Home Screen > App Drawer > ZLINK > Toolbox icon

ZLINK Settings:

After opening the ZLINK interface, tap the Settings button located at the bottom right corner to enter the configuration menu.

1. Driver Position: Tap to set the driver position (e.g., left-hand or right-hand drive). This setting will take effect the next time the app is restarted.
2. FPS Engine: Tap to enable or disable (e.g., left-hand or right-hand drive) FPS engine.
3. Floating Navigation: Tap to enable or disable the option to display CarPlay/Android Auto as a floating window on the screen.
4. Background Connection: Tap to enable or disable background reconnection. When enabled, ZLINK can reconnect automatically the next time the phone is detected nearby.

6.2 Apple CarPlay Connection

The S8 Gen4 supports Wireless Apple CarPlay only, enabling seamless integration between your iPhone and the head unit for a safer and smarter in-car experience.

6.2.1 Wireless Apple CarPlay Introduction

Wireless CarPlay allows iPhone users to access Apple Maps, Google Maps, calls, messages, Apple Music, and supported third-party apps directly on the S8 Gen4 in a clean and safe interface.

Note: The S8 Gen4 does not support wired CarPlay.

6.2.2 How to Configure Wireless Apple CarPlay Connection

Requirements

• The vehicle must be in Park (P).
• Your iPhone and the S8 Gen4 must not be connected to other Wi-Fi or Bluetooth devices.
• Enable Bluetooth and Wi-Fi on your iPhone.
• Enable Bluetooth and Wi-Fi on the S8 Gen4:

Settings > Network Settings > Wi-Fi

Operation Steps:

Navigation Path: Navigate to Home Screen > Status Bar > Bluetooth Icon

Step 01: Slide down the Status Bar and long press the Bluetooth icon to enter the Bluetooth settings interface. Turn on the switch to enable Bluetooth.

Step 02: Enable Bluetooth and Wi-Fi on your iPhone. On your iPhone, look for the S8 Gen4 device name (e.g., “S8 Gen4XXXX”).

Step 03: Tap Pair and confirm any prompts on your iPhone to complete Bluetooth pairing.

Step 04: Once Bluetooth pairing is completed, open the ZLINK app. Tap the Toolbox icon at the bottom. You will see three options: CarPlay / Android Auto / Mirror.

Step 05: Tap CarPlay to start Wireless Apple CarPlay.

6.1.4 Important Note (Wireless Apple CarPlay Usage Notes)

• There is no need to manually select the S8 Gen4 Android head unit from the phone’s Wi-Fi list; once Bluetooth pairing is completed, it will automatically connect via Wi-Fi.
• Wi-Fi network connections are not supported while using Wireless Apple CarPlay.
• This manual provides basic setup instructions. For detailed Wireless Apple CarPlay features and usage, visit Apple's official site: iOS - CarPlay - Apple

6.2 Wireless Android Auto Introduction

Wireless Android Auto provides a richer interactive experience and convenient wireless connectivity between your Android phone and the S8 Gen4 Android head unit. It allows you to access Google Maps, Waze, calls, messages, music apps, and Google Assistant on the S8 Gen4 interface.

6.2.2 How to Configure Wireless Android Auto Connection

Required App

• The Android Auto app must be installed (from Google Play, if available in your region).

Compatible Android Versions

• Android phones with Android 11.0 or later
• Google Pixel or select Samsung phones with Android 10.0 or later
• Samsung Galaxy S8/S8+/Note8/Note9 or later with Android 9.0 (Pie) or later
• For the latest list, refer to Google’s official compatibility page.

6.2.3 How to Configure Wireless Android Auto Connection

Prerequisites:

1. Vehicle must be in Park (P).
2. The Android phone and the S8 Gen4 must not be connected to other Wi-Fi or Bluetooth devices.
3. Enable Bluetooth and Wi-Fi on your Android phone.
4. Enable Bluetooth and Wi-Fi on the S8 Gen4.
5. On your Android phone, open Android Auto settings and ensure “Wireless Android Auto” (or “Wireless projection”) is enabled.

Operation Steps:

Step 01:

Slide down the Status Bar and long press the Bluetooth icon to enter the Bluetooth settings interface. Turn on the switch to enable Bluetooth.

Step 02:

Enable Bluetooth and Wi-Fi on your Android phone. Search for the S8 Gen4 device name (e.g., “S8 Gen4XXXX”) and select it.

Step 03:

Tap Pair and confirm all prompts on your phone to complete Bluetooth pairing.

Step 04:

Once paired, open the ZLINK app and tap the Toolbox icon.

Step 05:

Select Android Auto from the three options (CarPlay / Android Auto / Mirror) to start Wireless Android Auto.

6.2.4 Important Note (Wireless Android Auto Usage Notes)

• First Use Wireless Android Auto: If you are using wireless Android Auto on your phone for the first time, make sure that the wireless Android Auto option or wireless projection option is on.
• Audio Output Limitation: Audio from Android Auto cannot play simultaneously with S8 Gen4's local media sources (e.g., Radio, Bluetooth Music, USB/SD Card Music). When Android Auto audio is active, other sources are paused or muted.
• This Manual Provides Basic Setup Instructions: For detailed Android Auto features and usage, visit the official Android site: https://www.android.com/auto

6.3 Phone Mirroring

Phone Mirroring allows you to project your smartphone’s screen onto the S8 Gen4 infotainment system via USB or Wi-Fi. You can view navigation apps such as Google Maps or watch videos (e.g., YouTube) directly on the car’s screen.

Compatible with select Android phones and iPhones.

6.3.1 Configure Wireless Phone Mirroring for iPhone

Before starting, open the ZLINK App from the App Drawer, then tap the Mirror option from the toolbox panel.

Option 1: USB Connection

1. Use the original iPhone USB cable.
2. When prompted on your iPhone, tap “Trust This Device.”

Option 2: Wi-Fi Connection

1. In the ZLINK Mirror interface, select “iPhone.”
2. Ensure both the S8 Gen4 head unit and your iPhone are connected to the same Wi-Fi network.
3. On your iPhone, select “Screen Mirroring.”
4. Select the device name displayed on the S8 Gen4 screen to start mirroring.

6.3.2 Configure Wireless Phone Mirroring for Android Phone

Before starting, open the ZLINK App from the App Drawer, tap the Toolbox icon, then select the Mirror option. This prepares the S8 Gen4 for Android Phone Mirroring.

(Navigation Path: Home Screen > App Drawer > ZLINK)

Option 1：USB Connection

1. Tap the Help icon at the top of the ZLINK interface, scan the QR code, and download the required mirroring app onto your Android phone.
2. Connect your phone to the head unit's USB port, open the mirroring app on your phone, and tap “Start Screen Projection.”

Option 2: Wi-Fi Connection

1. Tap the Help icon at the top of the ZLINK interface, scan the QR code, and download the required mirroring app onto your Android phone.
2. Make sure your Android phone is connected to the same Wi-Fi network as the S8 Gen4 head unit.
3. On your Android phone, open the mirroring app and follow: ZLINK App > Wireless Connection > Start Screen Projection > Start Now
4. Wait a few seconds. The S8 Gen4 screen will begin displaying your Android phone’s screen.

Note: Screen control remains on the Android phone (mirroring only).

Chapter 7 DriveChat App (AI Voice Assistant)

7.1 Introduction to DriveChat & SSHub App

The S8 Gen4 Android head unit comes pre-installed with the DriveChat app, an innovative Al voice assistant powered by SSHub and ChatGPT. DriveChat allows you to control the S8 Gen4 via voice commands and interact with multiple Al chatbots for information, assistance, or entertainment.

DriveChat Functionality

• Control S8 Gen4 functions via voice commands (e.g., music playback, navigation, settings).
• Interact with multiple AI chatbots for information, guidance, or general conversation.

SSHub Companion App (Required)

You must download the SSHub app on your smartphone (available on the App Store or Google Play) to:

1. Create and manage your ATOTO account.

2. Configure DriveChat settings (e.g., wake words).

3. Sync settings between your phone and the S8 Gen4 head unit.

4. Manage optional paid features or premium AI models for DriveChat (check the SSHub app for details).

Potential Costs

• Some advanced DriveChat features or specific AI models may require purchases, which are managed through the SSHub app.

7.2 Setting Up DriveChat (Account & Wake Words)

Overall Process

Download SSHub app -> Create/Log in to ATOTO Account -> Access DriveChat (Link S8 Gen4 to SSHub Account via QR Scan) -> Set Wake Words.

Operation Steps

Step 1: Download & Sign In to SSHub

1. Download the SSHub app from the App Store (iOS) or Google Play Store (Android).

2. Open SSHub and create a new ATOTO account, or log in with a supported third-party account (e.g., Google).

Step 2: Link S8 Gen4 to SSHub Account

1. On the S8 Gen4, open the DriveChat app (pre-installed; if missing, download via FindApps).

2. A QR code will appear on the S8 Gen4 screen.

3. On your phone, open SSHub → tap Add ATOTO Device (+) → choose Scan → scan the QR code displayed on the S8 Gen4.

1. Tap the Add ATOTO Device button, enter a device name (e.g., S8 Gen4 Android head unit), and then tap Confirm. Your S8 Gen4 is now linked to SSHub.

Step 3: Set Wake Words

1. Open DriveChat app on the S8 Gen4, locate Wake-up Options and tap to enter settings.

2. Tap + New Wake Word to start the setup.

3. Tap Confirm, enter your preferred wake word, then tap Confirm again to complete the input.

4. Tap Start to begin recording the wake word. Repeat this step until a checkmark (√) appears. Then tap Confirm to finish. The wake word is now saved.

Notes:

• You must set at least two distinct wake words:
  • One for voice control (e.g., "Hey Mojo")
  • One for chatbot interaction (e.g., "Hey Piko")
• DriveChat (Al Voice Assistant) processes one request at a time. Wait until the current icommand/conversation ends before starting another.
• Recognition is strongest for the person who recorded the wake word. If multiple users share the system, each should record their own.
• Avoid common phrases/names to prevent accidental activation

7.3 Using DriveChat (Voice Control & Chatbot)

DriveChat lets you interact with the S8 Gen4 head unit more safely, naturally, and efficiently while driving. It combines voice control and AI chatbot conversation for both practical use and entertainment.

1. Personalized Wake Words

• Each user can record their own custom wake words:
  • For voice control commands (e.g., "Hey Mojo").
  • For chatbot interaction (e.g., "Hey Piko").
• Custom wake words improve accuracy and reduce accidental activations.

2. Voice Control of Head Unit Functions

You can control the S8 Gen4 with simple voice commands.

Examples:

User: "Hey Mojo, turn on the Radio."

DriveChat (Mojo): "Radio turned on for you."

User: "Hey Mojo, skip to the next track."

DriveChat (Mojo): "Skipping to the next track."

3. Conversational Interaction

Use DriveChat as a companion for fun and engagement.

Example:

User: "Hey Piko, tell me a joke."

DriveChat (Piko): "Sure! Why don’t scientists trust atoms? Because they make up everything!"

User: "Thanks, Piko! That was funny. Can you tell me a story about atoms?"

DriveChat (Piko): "Of course! Once upon a time in Atomville..."

4. AI Chatbot for Advice

Use DriveChat as a companion for fun and engagement.

Example:

User: "Hey Mojo, switch to novelist mode."

DriveChat (Mojo): "Switching to novelist mode."

User: "Hey Piko, how can I write a compelling novel introduction?"

DriveChat (Chatbot - Novelist Mode): "Start with an intriguing question, a vivid description, or a dramatic event..."

7.3.1 Activate DriveChat

You can activate DriveChat by using wake words. Different wake words trigger different functions.

Examples:

1. General Conversation

Say: "Hey Piko, What's the highest mountain in the world?"

DriveChat (Piko) answers: “Mount Everest is the highest mountain in the world.”

2. Switch to Professional Chatbot Role

Say: “Hey Mojo, switch to novelist mode.”

DriveChat (Piko): “Switching to novelist mode.”

Now continue with: “Hey Piko, how can I write a compelling novel introduction?”

In this context, "Hey Mojo" serves as the control wake word. After DriveChat switches to the novelist role, you should use "Hey Piko" to continue the conversation.

Note:

• “Hey Mojo” (control wake word) → for system control & mode switching.
• “Hey Piko” (dialogue wake word) → for interactive conversations.
• Wake words shown here are examples only. You can customize your own in the DriveChat app on the S8 Gen4 head unit.

7.3.2 Configuring the Chatbot Settings

Before using the chatbot feature of DriveChat, you need to pair and configure it with the DriveChat app (on the S8 Gen4) and the SSHub app (on your smartphone).

Preparation Requirements

Ensure the following:

1. The S8 Gen4 head unit is connected to the internet (via 4G, Wi-Fi, or mobile hotspot).

2. SSHub app is installed and logged in on your smartphone.

3. DriveChat app is pre-installed on the S8 Gen4 or downloaded via FindApps.

Operation Steps

Step 1: Log in to SSHub on Your Smartphone

1. Open the SSHub (App Store or Google Play).

2. Log in with your ATOTO account or a supported third-party account (e.g., Google).

Step 2: Pair the S8 Gen4 with SSHub App

1. On the S8 Gen4, open the DriveChat app. A QR code will appear.

2. On your phone, open SSHub, tap Add ATOTO Device (+), then tap Scan and scan the QR code on the S8 Gen4 screen.

3. The S8 Gen4 is now successfully paired with the SSHub.

Step 3: Configure the Chatbot

1. In the SSHub app, tap DriveChat to enter chatbot configuration.

2. Tap to AI Chatbot view All Available Chatbots.

3. Select a chatbot and configure:

• Use on Car Stereo → activates chatbot on the S8 Gen4.
• Decision Think Tank → example chatbot name.
• Language & Tone → choose language and speaking style.
• Current Model → choose the AI model.
• Chat → interact directly on your phone.

4. In the Mine list, toggle the chatbot ON/OFF to enable or disable it on the S8 Gen4.

7.4 Important Notes (DriveChat)

1. Account Owner Recognition

Voice recognition and response accuracy may improve when commands are given by the primary account holder linked through the SSHub app.

2. App Updates

Both the DriveChat app (on the S8 Gen4 head unit) and the SSHub app (on your smartphone) receive periodic updates. Features, interfaces, or setup steps may change. Always consult the latest app versions for up-to-date instructions

3. Network Dependency

DriveChat requires an active internet connection on the S8 Gen4 head unit to process commands and generate AI responses. Response times may vary depending on your network speed and stability.

Chapter 8 Dual Built-in Microphone & Mic Port

The chapter introduces the S8 Gen4 Android head unit’s dual built-in noise-canceling microphones, located on both sides of the bottom of the front panel, which employ adaptive noise reduction algorithms to enhance voice capture sensitivity and accuracy. This technology delivers exceptional voice interaction and call noise suppression performance in complex, noisy environments, providing drivers with more convenient, safer, and more comfortable interaction experiences. Also, the S8 Gen4 Android head unit’s rear panel has a Mic port for External Microphone Input to improve voice input quality.

8. 1 Dual Noise-Canceling Microphone

The dual built-in noise-canceling microphones located on both sides of the bottom of the front panel employ adaptive noise reduction algorithms to enhance voice capture sensitivity and accuracy. They have the following features:

• Precise Voice Recognition

Dual built-in microphones (left/right) form an array system to accurately capture voice commands, enhancing clarity and recognition accuracy for hands-free operation.

• Advanced Noise Reduction

Intelligent algorithms filter engine/wind noise, maintaining clear call quality and voice interaction whether stationary or at high speeds.

• Directional Sound Capture

Microphone array locates and focuses on driver/passenger voices while suppressing other cabin noise, improving voice interaction precision.

• Multi-Scenario Application

Supports voice assistant, calls, navigation, and multimedia controls for safer and more convenient vehicle experiences.

8.2 Mic Port

The S8 Gen4 Android head unit’s rear panel has a Mic port for external microphone input to improve voice input quality. If you have higher demands for voice interaction, you need to connect an external microphone to the Mic port. We recommend purchasing our ATOTO AC-MIC20 external microphone (sold separately), which has the following features:

• Voice Input Optimization

The high-sensitivity microphone ensures clear audio capture, improving voice recognition accuracy for voice assistants, navigation, and calls. Additionally, the external mic can be placed near the driver, offering superior sensitivity and pickup range over built-in mics.

• Connector Type

3.5mm Plug: Universally compatible, designed for external microphone input, and supports plug-and-play.

Setup & Usage:

Refer to the separate ATOTO AC-MIC20 User Manual on the Eproductcare website

(www.eproductcare.com) for further details. (Navigation Path: Navigate to Eproductcare >

More > Microphone > AC-MIC20)

Notes:

1. When installing the external microphone, be sure to remove the dustproof mesh first, otherwise it may affect call quality.
2. If you notice poor call quality with the external microphone, please check whether the dustproof mesh has been removed. If not, remove it promptly to restore normal audio performance.

Chapter 9 FM/AM Radio App

The FM/AM radio integrates advanced radio reception technology and user-friendly interactive design. This functionality supports dual-band reception (FM frequency modulation and AM amplitude modulation), equipped with RDS (Radio Data System), AF (Automatic Frequency Switching), and TA (Traffic Announcement) capabilities. It offers comprehensive station management and enhanced listening features, enabling users to access music, news, and real-time traffic information, thereby fulfilling diverse listening needs.

9.1 Radio Home Screen Interface

Navigate to Home Screen > APP Drawer > Radio App

【AI图解：This image shows the FM / AM Radio interface of the S8 Gen4 Android head unit. The icons are arranged from left to right and top to bottom. At the top-left is the FM / AM toggle button. At the top-right, four icons appear from left to right: RDS, DSP, Background Settings, and Radio Settings. At the bottom-left, four icons appear from left to right: Local / Distance Search Mode, Mute, Favorites, and Search. The interface supports band switching, RDS information display, DSP audio adjustment, background customization, radio sensitivity settings, local or distance search mode selection, mute control, station favorites management, and automatic or manual station search.】

FM / AM Radio Interface Icon Reference (By Screen Order)

On the FM / AM Radio interface, icons are described in the order from left to right, top to bottom.

The numbers (1–9) used below correspond directly to items 1–9 in the following settings list.

Top-left

1. FM / AM toggle button

Top-right (four icons arranged from left to right)

2. Icon labeled “RDS”, indicating RDS.

3. Icon resembling an adjustment knob or equalizer, indicating DSP.

4. Icon resembling an image or photo, indicating Background Settings.

5. Icon resembling a gear, indicating Radio Settings.

Bottom-left (four icons arranged from left to right)

6. Icon with radio signal waves, indicating Local / Distance Search Mode.

7. Icon showing a speaker with a slash, indicating Mute.

8. Heart-shaped icon, indicating Favorites.

9. Magnifying glass icon, indicating Search.

The following are the most common settings for the FM/AM Radio Interface:

1. Tap FM or AM to switch between FM and AM radio bands.
2. RDS: Tap “RDS” for station info (name, program type)，auto frequency switching (AF), and real-time traffic alerts (TA).
3. DSP: Open the DSP equalizer panel to adjust sound style, tone quality, speaker balance, filters, and audio field.
4. Background Settings: Change the Radio app background theme or select a custom image.
5. Radio Settings: Adjust am/fem sensitivity level.
6. Local/Distance Search Mode: Switch between Local Search（Finds stations with strong nearby signals）and Distance Search: Finds stations from farther distances with weaker signals
7. Mute:Tap to mute or unmute the radio audio.
8. Favorites:Tap the heart icon to add the current station to your preset list or remove it from favorites.
9. Search (Short Press / Long Press): Short Press: Preview the next available station. Long Press: Automatically scan/search for all available stations

Radio Tuning Buttons (Left & Right Arrows)

• Left Arrow Button: Short press to switch to the previous preset station.Long press to scan backward to search for the next available station with a strong signal.
• Right Arrow Button: Short press to switch to the next preset station.Long press to scan forward to search for the next available station with a strong signal.

9.2 Radio Status Baar

【AI图解：This image shows the FM / AM Radio status control area of the S8 Gen4 Android head unit. The status icons are arranged in two rows from left to right, top to bottom. The top row includes: Auto Search for clearer broadcast, Preset Station Scan, Manual Frequency Scan, Auto Save to Preset, and Stereo Mode On/Off. The bottom row includes: AF (Alternative Frequency), TP (Traffic Program), TA (Traffic Announcement), and PTY or NONE (Program Type Selection). The icons appear gray when disabled and turn black when enabled.】

FM / AM Radio Status Icons Reference (Number Mapping)

On the FM / AM Radio interface, a group of status icons is displayed in a dedicated control area on the screen. The icons are arranged in two rows and are identified from left to right, top to bottom.

The numbers (1–9) used below correspond directly to items 1–9 in the following description.

Top row (from left to right)

1. Icon with radio signal waves.
2. Icon showing a circle with a wavy line inside.
3. Magnifying glass icon.
4. Downward arrow icon.
5. Overlapping circles icon.

Bottom row (from left to right)

6. Icon labeled “AF”.

7. Icon labeled “TP”.

8. Icon labeled “TA”.

9. Icon labeled “PTY” or “NONE”.

Note: The icon appears gray when disabled; it turns black when enabled.

1. Automatically searches for a clearer broadcast of the current station.
2. Plays each saved preset station in sequence, switching to the next preset every 5 seconds.
3. Manual Frequency Scan: Long-pressing the left or right arrow buttons performs a continuous frequency scan
4. All stations found during an automatic scan will be saved directly into the preset list.
5. Stereo Mode On/Off
6. AF (Alternative Frequency)，When the current station becomes weak or noisy, AF automatically switches to another frequency broadcasting the same station but with better signal clarity.
7. TP allows the radio to detect stations that broadcast traffic information programs. In regions that support TP, the system will prioritize tuning to stations with traffic program data available.
8. When enabled, the system monitors for real-time traffic announcements, such as:Road conditions/Accidents,Closures / construction,Congestion alerts
9. PTY (Program Type Selection) Allows filtering and searching for stations by content category

9.3 Radio Sensitivity Adjustment

You can adjust the AM/FM sensitivity level in the Radio Settings by tapping the Settings icon located at the top-right corner of the radio interface.

AM/FM Sensitivity

Use this option if you are receiving too few stations or experiencing poor audio quality.

• Minus (–): Tap to reduce radio sensitivity.
• Plus (+): Tap to increase radio sensitivity.

Notes:

• Setting the sensitivity too high may cause poor reception for certain stations, leading to static noise and reduced audio quality.
• Setting the sensitivity too low may reduce the number of stations received, affecting the overall listening experience.

Auto-Tune Sensitivity

For seamless, adaptive performance, use Auto-Tune Sensitivity, recommended for everyday listening.

Chapter 10 DSP (Customize Audio Experience)

This chapter systematically elaborates on the core functions of in-car audio effect adjustment. Its built-in digital signal processor (DSP) allows for extensive audio customization via the equalizer application. Through multi-dimensional audio control technology, it provides users with a comprehensive end-to-end audio optimization solution, ranging from basic tuning to in-depth customization, adaptable to different music genres, in-car spatial layouts, and personalized listening preferences.

S8 Gen4 supports a 32-band frequency equalizer. Adjust the gain (boost) or attenuation (cut) of specific audio frequency bands to optimize the sound profile.

10.1 EQ Adjustment (Frequency Bands)

Navigation Path: Navigate to Home Screen > App Drawer > DSP App > Equalizer

EQ Interface Overview

The top bar displays the EQ preset name (e.g., Standard, User, etc.).

There are 13 default EQ presets:

Standard, User 1, User 2, User 3, Classic, News, Pop, City, Movie, Electronic, Rock, Techno, Jazz.You can create a custom EQ profile using the User presets by tapping the Edit icon beside the preset name.

Frequency Band Adjustment

• Adjust any frequency band by tapping the “+” or “–” buttons to boost or cut frequencies (20 Hz ~ 16 kHz).
• The real-time frequency response curve above will reflect the change visually.
• Tap Apply (top right) to save, or Reset to discard changes.

10.2 Balance Adjustment (Field / Listening Position)

This feature creates a personalized sound field based on where passengers sit, optimizing audio for real driving conditions and enhancing the immersive listening experience.

1. Preset Listening Modes

• Front Left Mode – Balanced for multi-passenger scenarios.
• Front Right Mode – Optimized for the driver, reducing driving noise interference.
• Passenger Mode – Enhances the front passenger side for asymmetrical listening.
• Full Vehicle Mode – Strengthens rear output, ideal for rear passengers.

2. Custom Balance Adjustment

• Use Manual Tuning to precisely adjust front/rear and left/right balance by dragging the crosshair on the cabin diagram.

Operation Steps

Step 01: Access Field Adjustment

Navigation Path: Home Screen > App Drawer > Equalizer (EQ) App > Field

Step 02: Select Preset Listening Mode

Tap a preset on the left sidebar (Front Left / Front Right / Passenger / Full Vehicle).

The cabin diagram will highlight the active listening zone.

Step 03: Manual Adjustment (Custom Mode)

Drag the crosshair within the cabin diagram to set the preferred listening focus point.

10.3 Surround (Gain / Delayed)

The Surround section allows users to adjust individual speaker levels, apply time delay, mute channels, and reverse speaker phase to optimize the in-car acoustic environment.

The interface contains two sections: Gain and Delayed.

10.3.1 Gain Adjustment

Function: Controls the volume level of each individual speaker channel.

Navigation: DSP App > Surround > Gain

Operation Steps

Step 01: Drag the slider up or down to adjust speaker volume precisely.

Speaker Mute Button

Tap the speaker icon under the minus button to mute that speaker.

Use cases:

• Quickly silence a specific speaker
• Test individual channels
• Isolate sound for troubleshooting

Linked Left/Right Mute

• Tap the Link button
• Then tap either left or right mute

→ Both L/R speakers mute simultaneously

Phase Inversion (Left/Right Phase Button)

Reverses the sound wave phase of the selected speaker.

Purpose: To correct phase cancellation, which can occur when speaker positions cause left and right channels to cancel each other, reducing bass and clarity.

Activating phase inversion may help restore low-frequency impact.

10.3.2 Delay Adjustment (Time Alignment)

This feature ensures sound from all speakers reaches the listener’s ears at the same time, creating a centered and accurate sound stage—like sitting at the sweet spot in a studio.

Operation Steps

Step 01: Set Listening Position

Choose a primary location (typically the driver). For general balance, choose the cabin center.

Step 02: Measure Distance

Measure the straight-line distance from the listening position to each speaker:

Front Left, Front Right, Rear Left, Rear Right.Step 3: Open Delay Adjustment

Navigation Path: Equalizer (EQ) App > Surround > Delayed

Step 04: Apply Delay

Drag the slider to increase or decrease delay. (Max adjustment: 680 cm distance, 20 ms delay.)

10.4 Filter(High/Low-Pass & Bass Enhancement)

The Filter section precisely controls what frequencies each speaker receives, ensuring optimal performance and protecting speakers from unsuitable frequencies.

Two modes are provided:

1. High/Low-Pass Filtering (default tab)
2. Bass Enhancement (second tab)

10.4.1 High-Pass & Low-Pass Filtering

These filters allow the user to define the frequency range delivered to each speaker.

Benefits

• Improved clarity and cleaner separation
• Prevents frequency overlap and energy loss
• Protects speakers from receiving frequencies they cannot handle
• Enables custom tuning to match your vehicle’s acoustics

High-Pass Filter (HPF): Allows frequencies above the cutoff to pass.

• Found on the left panel (“High pass filtering”)
• Adjust using the left/right arrow buttons
• Choose slope: 6 / 12 / 18 / 24 / 36 / 48 dB per octave
• Toggle switch enables/disables HPF

Example:

If HPF = 20 Hz → frequencies below 20 Hz are reduced or blocked. This protects smaller speakers from deep bass frequencies.

Low-Pass Filter (LPF): Allows frequencies below the cutoff to pass.

• Found on the right panel (“Low pass filtering”)
• Adjust with left/right arrows
• Slope options same as HPF
• Toggle switch enables/disables LPF

Example:

If LPF = 20 kHz → frequencies above 20 kHz are reduced. This is essential for subwoofers, which only reproduce low frequencies.

10.4.2 Bass Enhancement (Second Tab)

In the Bass Enhancement tab, users can adjust:

• Center Frequency – which bass band is emphasized
• Bass Gain – level of boost applied

Especially useful for vehicles without a dedicated subwoofer, significantly improving low-frequency performance.

Chapter 11 AvIn (Audio and Video Input) App

The AVIN (Audio and Video Input) function on the S8 Gen4 Android head unit supports external audio and video sources through RCA connectors. This allows users to connect third-party media devices—such as DVD players, gaming consoles, digital TV boxes, or other multimedia players—and play their content directly through the S8 Gen4 Android head unit’s screen.

Key Features

1. RCA-Compatible External Input

The S8 Gen4’s AUXIN (Audio and Video) ports accept standard RCA analog signals (composite video and stereo audio).

The AUXIN ports support external devices equipped with RCA output jacks labeled:

• Yellow: Video input
• Red: Right-channel audio input
• White: Left-channel audio input

Offers a simple and flexible way to expand in-car media functionality without requiring USB or HDMI inputs.

2. AVIN App Integration

Audio and video input from external devices can be accessed using the pre-installed AVIN App.

Launching the app will display video on the S8 Gen4 screen while playing audio through the original vehicle speakers.

3. Synchronized Audio and Video Playback

Audio input uses standard stereo analog signals (left and right channels).

Video input follows the composite video (CVBS) standard.

Video is displayed on the S8 Gen4 screen, and audio is played through the car’s sound system simultaneously.

Prerequisites for AUXIN Connection

Before connecting an external device to the AUXIN input, ensure that the device supports RCA output and includes all of the following ports:

• Left-channel audio output
• Right-channel audio output
• Video output

Note: The layout of the AUXIN ports may vary depending on the S8 Gen4 model or the design of the included RCA wiring harness. Refer to the specific wiring documentation (Installation Instructions) for detailed information.

Operation Steps

Step 01: Confirm the External Device’s Output Ports

Verify that the external device you plan to connect includes standard RCA output ports.

Step 02: Connect the External Device to the S8 Gen4

Connect the device’s RCA output ports to the corresponding RCA input ports on the S8 Gen4 wiring harness, ensuring audio and video signals are matched correctly.

Step 03: Launch the AVIN App

Navigation Path: Home Screen > App Drawer > AVIN App

Tap the AVIN App icon to open the video interface. The system will automatically detect and display the external video signal.

Step 04: Adjust Volume

Swipe down the status bar and use the volume slider in the Quick Settings Panel to adjust playback volume.

Notice:

Video playback from the AVIN App is only available when the vehicle is stationary, unless the user manually disables the “No Video Watching While Driving” option in system settings. This restriction is intended to reduce driver distraction and comply with safety regulations.

To disable “No Video Watching While Driving”:

Navigation Path:Home Screen > App Drawer > Car Settings > General > Car Watch Video While Drive.Tap the switch to enable or disable this option.

Chapter 12 HDMI-IN App (HDMI Input)

The HDMI-IN App is a built-in application on the S8 Gen4 Android head unit designed to receive and display HDMI input signals. It allows you to connect external devices—such as TV sticks, game consoles, digital cameras, and streaming devices—and display their real-time video output directly on the S8 Gen4 screen. This provides a richer multimedia experience and extends the functionality of your head unit.

Compatibility Requirement

• The S8 Gen4 does not include a native HDMI input port.

To enable HDMI functionality, you must use the ATOTO AC-HAV50 adapter (sold separately).

• When properly connected, the AC-HAV50 enables the S8 Gen4 to receive synchronous 1080P video and high-definition audio from external HDMI devices.

Software

The S8 Gen4 includes a pre-installed HDMI-IN App, which is used to display video streams from external HDMI sources.

Operation Steps

Step 01: Understand the Adapter

For installation instructions and detailed wiring information, refer to the ATOTO AC-HAV50 User Manual available on the Eproductcare website.

Navigation Path: Eproductcare > More > Video In/Out Adapter > AC-HAV50

Step 02: Watch High-Definition Video

Navigation Path: Home Screen > App Drawer > HDMI-IN App

Tap the HDMI-IN App icon to view high-definition video from an external device connected through the AC-HAV50 adapter.

Important Notes

• Video and photo playback is disabled while driving.
• The vehicle must be completely stopped and the parking brake engaged for viewing to be enabled.

Chapter 13 DAB Plus (DAB Plus App)

The DAB+ app comes pre-installed on all S8 Gen4 Android head units. For models without a “D” in the model number, a compatible external USB DAB+ receiver (DAB+ Box) is required to enable digital radio reception. DAB/DAB+ provides high-quality digital broadcasts with minimal interference, delivering clearer sound and more available stations compared to traditional FM radio.

Note:

• S8 Gen4 units with a “D” in the model include a built-in DAB+ module and must be used with the dedicated DAB antenna.
• Models without a “D” do not include an internal DAB+ module and require purchasing the external DAB+ receiver box AC-4475 separately.

Main Features

1. Digital Audio Broadcast Reception: Receives DAB/DAB+ signals for stable, high-quality digital audio playback.

2. Full-Band Auto Scan: Automatically scans all available DAB stations in the region, building the channel list and updating newly added stations.

3. Grouped Browsing: Stations are grouped by service type (e.g., News, Pop Music, Sports) for easier browsing.

4. Signal Strength Display: Shows the signal strength of the current station to help find the best reception area.

5. Program Information Display: Displays station logo, signal strength, station name, Ensemble, frequency, and PTY (Program Type), depending on broadcaster data.

6. DLS Scrolling Information: Real-time text info (current program, song title, news snippets) scrolls across the screen.

7. Preset Favorites Function: Save favorite stations to a preset list for quick access.

Required Accessory

• A compatible DAB+ USB receiver is required.
• Use the ATOTO AC-4475 USB DAB+ receiver (DAB+ Box) (sold separately).

Note: The S8 Gen4 is not compatible with third-party DAB+ receivers.

Operation Steps

Step 01: Connect the DAB+ Receiver (DAB+ Box)

• Plug the ATOTO AC-4475 USB DAB+ receiver into any USB port on the S8 Gen4.
• Scan the QR code below and select the product model to view detailed instructions.

Step 02: Launch the DAB+ App

• Navigation to Home Screen > App Drawer > DAB+ App.
• Tap the app icon to launch the application.

Step 03: Full-Band Background Scanning

• The system automatically scans all digital radio frequencies in the region (covering multiple Ensembles).
• Found channels are saved to the channel list.

Note: Scanning may take several minutes.

Step 04: Browse and Listen

• Tap the “<” icon to expand the channel list.
• Browse and tap any station to play.
• Features include station switching, favoriting, and viewing signal strength.

Step 05: Playback Controls

• Play/Pause: Tap the Play or Pause button.
• Switch Stations: Tap Previous or Next.
• Favorite/Unfavorite Station: Tap the heart icon.
• Expand Ensemble List: Tap the “^” icon to view all stations in a broadcast service group.

Important Notes:

1. Ensure the head unit is connected to a compatible DAB+ Box before using the DAB+ app.
2. DAB+ service is only available in Europe, Australia, and the UK. Verify local availability before use.
3. If no stations are received, try moving the vehicle or relocating the DAB+ Box to improve signal reception.

Chapter 14 Files Manager App (Files App）

This app functions like a file manager on your smartphone or computer, allowing easy management of files stored on the S8 Gen4 head unit and connected devices. With an intuitive interface, you can browse, organize, copy, and delete files from internal storage, USB drives, microSD cards, and more.

Operation Steps

Navigation Path: Home Screen > App Drawer > FileManager App

1. Manage Local Files

Step 01: Open the FileManager app.

Step 02: Browse, organize, copy, and delete files as needed.

2. Manage Files on an External Storage Device (Example: USB Flash Drive)

Step 01: Insert the USB flash drive into the S8 Gen4 head unit’s USB port.

Step 02: Open the FileManager app.

Step 03: Locate and tap the USB (F) folder to open the file management page.

Step 04: Browse, organize, copy, or delete files as needed.

Step 05: Once finished, safely unplug the USB flash drive.

3. Transfer Files from an External Storage Device to S8 Gen4 (Example: USB Flash Drive)

Step 01: Insert the USB flash drive into the S8 Gen4 head unit’s USB port.

Step 02: Open the FileManager app.

Step 03: Locate and tap the USB (F) folder to open the file management page.

Step 04: Select a file you want to transfer. A check mark will appear next to selected files.

Step 05: Use the action bar at the bottom. Tap Copy or Cut to transfer the selected file.

Step 06: In the sidebar, choose a destination folder (Internal or Photo Folder).

Step 07: Tap your chosen folder, then tap Paste to complete the transfer.

Step 08: When finished, safely unplug the USB flash drive.

Note:To transfer files from the S8 Gen4 to a USB drive, follow the same steps but switch the selection source and destination.

Chapter 15 USB/Micro SD Card Playback

The chapter introduces that the S8 Gen4 Android head unit supports local media playback via USB ports and Micro SD card slots, enabling direct access to various media files (Document / Photo / Audio / Video files) stored on external storage devices. Users can simply insert their USB drives or Micro SD cards into the corresponding interfaces to conveniently browse and play content, significantly enhancing both entertainment options and information accessibility during journeys.

Navigation Path: Navigate to Home Screen > App Drawer > Files Manger App

Note: Using a USB flash drive as an example; the steps are similar for other external storage devices.

Step 01: Insert the USB Flash Drive.

Insert the USB flash drive into the USB port of the S8 Gen4 Android head unit.

Step 02: Launch the File Explorer App.

Tap the Files Manager App icon to open the corresponding interface, and the interface will display a list of available storage sources, such as:

• Local Storage
• USB Storage

Step 03: Browse Storage Devices.

From the opened interface, tap the(USB flash drive icon) to open the corresponding window and view its file contents. All folders and files are displayed in a standard directory structure.

Step 04: View or Play Files.

In the opened interface, you can choose to view or play documents, photos, audio, or video files.

Step 05: Disconnect USB Safely.

Before physically removing the USB device:

1. Pause or stop playback
2. Return to the home screen or file manager
3. Ensure the USB device is not being accessed to prevent data corruption

Important Note:

1. Certain high-bitrate or professional video codecs may not be supported.
2. Watching video or photos while driving is against Federal, State, and Local laws.
3. Do not use features of this S8 Gen4 Android head unit if it cannot be operated safely and legally in your location.
4. Video and photos cannot be viewed while driving. The vehicle must be stationary and the parking brake applied to enable viewing.

Chapter 16 Music App

The Music App is a built-in audio player on the S8 Gen4 Android head unit. It allows you to enjoy music stored on a USB drive, MicroSD card, or the unit’s internal storage. Designed for the large touchscreen, it provides smooth operation and a rich in-car listening experience. Key features include:

• Supports multiple audio formats including MP3, WMA, FLAC, APE, WAV.
• Automatically detects music files from external storage.
• Provides folder browsing and categorized display.
• Supports playback modes such as sequential, shuffle, and single-track loop.
• Supports lyrics display and album cover art (depending on file metadata)
• Supports background playback and steering wheel control (if configured)

Operation Steps

Step 01: Insert a Storage Device

Insert a USB drive or MicroSD card containing audio files into the corresponding port of the S8 Gen4 Android head unit system. The system will automatically scan and detect the music files.

Step 02: Launch the Music Player

Navigate to Home Screen > App Drawer > Music Player App. Tap to launch the Music Player app and open the corresponding interface.

Step 03: Select a Playback Source and Music File to Play

In the interface, select the corresponding storage device (e.g., “USB (F),” “SD,” “Local”). Browse folders or categorized lists and tap any song to start playback.

Step 04: Playback Controls

In the music playback interface, tap the screen to display playback controls.

• To play/pause, tap Play or Pause button to play or pause the current song.

• To switch songs, tap Previous or Next button to switch to the previous or next song.

• To change the playback mode, tap the Playback Mode button to switch between sequential, shuffle, or single-track loop modes.

• To adjust the song playback progress, drag the progress bar to fast-forward or rewind the current song.

Chapter 17 Video App

The Video App is a pre-installed local video playback application on the S8 Gen4 Android head unit. It supports playing video files from USB drives, MicroSD cards, or local storage. Optimized for the S8 Gen4 Android head unit’s large display screen and touch operation, it supports multiple video formats and high-definition playback, meeting in-car entertainment needs while parked or resting.

Key features

1. Supports multiple video formats: MP4, AVI, MKV, MOV, 3GP, FLV, and more.
2. Automatically scans and detects video files on external devices.
3. Provides folder browsing and categorized display.
4. Offers playback-mode switching: single-video loop / play-all videos.
5. Allows full-screen / windowed playback mode switching.
6. Remembers playback position (resume from last point).
7. Includes basic controls such as fast-forward/rewind, pause/play, and progress slider.
8. Supports subtitle loading (e.g., .srt) and cover-art recognition.

Operation Steps

Step 01: Insert a Storage Device

• Insert a USB drive or MicroSD card containing video files into the head unit.
• The system will automatically detect and load the media content.

Step 02: Launch the Video App

• Navigate to Home Screen > App Drawer > Video App.
• Tap the app icon to open the video playback interface.

Step 03: Select Source and Video

• Choose the storage location (USB (F), SD, or Internal Storage).
• Browse folders and tap a video file to start playback.

Step 04: Playback Controls

• Play/Pause: Tap Play or Pause button to play or pause the current video.
• Switch Videos: Tap Previous or Next button to switch to the previous or next video.
• Full-screen/Window Mode: Tap the Full-Screen or Window button oat the top right corner of the screen to toggle display modes.
• Playback Mode: Tap the Playback Mode button to switch among:
  • Single-Video Loop (repeats the current video)
  • Play-All Videos (the next video starts automatically after the current one)
  • Shuffle (a random video will play after the current one).
• Playback Progress: Drag the progress bar to fast-forward or rewind the video.

Chapter 18 Split Screen

Split Screen allows users to run and view two applications simultaneously on the S8 Gen4 Android head unit. This feature enables true multitasking—for example, using navigation while playing music or browsing the internet—without frequently switching between apps. This improves both operating efficiency and driving convenience.

Main Features

1. Supports displaying two apps on the same screen at the same time without interference.
2. Allows users to adjust the size of the two windows by dragging the divider bar.
3. Offers quick methods to switch between apps or exit split-screen mode.
4. Compatible with many native and third-party apps (depending on whether the app itself supports split-screen mode).

Note: Split Screen is only available on Android car systems that support this feature and can only be used with apps that allow split-screen display.

Operation Steps

Note: The following example is for reference.

Navigation Path

Home Screen > Status Bar > Recent Apps Button (Square Icon)

Step 01: Open the Recent Apps Screen

Tap the Recent Apps button (square icon) to open the list of recently used applications.

Step 02: Locate the Split Screen Option

Tap the three-dot icon on the top-right corner of the app card. Select Split to Left or Split to Right to move the current app to one side.

If the Split option is displayed, it means the app supports Split Screen mode.

Step 03: Select Another App

After the first app moves to one side, select a second app from the Recent Apps list to occupy the other half of the screen.

Once Split Screen mode is active, you can:

1. Adjust window size: Drag the divider bar in the middle to change the display ratio of the two app windows.
2. Exit Split Screen: Drag the divider bar all the way to the left or right to return to full-screen (single app) mode.

Chapter 19 Camera Input

The S8 Gen4 Android head unit supports multiple camera input sources, including DVR (Front/Rear Recording Cameras) and USB Driving Video Recorders (DVR CAM). The DVR system on the S8 Gen4 supports single-channel recording, allowing users to manually switch between the front and rear camera feeds as needed. This provides flexible monitoring while maintaining clear, stable video footage.

Supported Camera Types and Functions

1. DVR Camera (Single-Channel Recording/Front & Rear View Camera)

• Only records one camera feed at a time.
• Users can manually switch between Front View Camera and Rear View Camera

2. Front Camera (FCAM)

• Captures live images in front of the vehicle.
• Assists with driving, parking, and collision avoidance.

3. Rear-Facing Cabin Camera

• Captures live images inside the vehicle cabin.
• Enables in-cabin monitoring and interior recording.

4. Backup Camera

• Displays the area behind the vehicle.
• Facilitates reversing and parking maneuvers safely.

5. Driving Safety Enhancement

• Supports multi-channel video display, image switching, and video recording.
• Improves the intelligence and safety of driving with real-time monitoring.

Note: Only officially designated ATOTO cameras are supported

• Front Camera: AC-HN9FR
• Rear Camera: AC-HN9CBV2
• Backup Camera: AC-HD02LR

19.1 DVR (Single-Channel Recording)

The DVR function of the S8 Gen4 supports single-channel video recording. Users can manually switch between front and rear cameras for flexible driving or parking monitoring. When used with the official ATOTO AC-HN9FR (Front) and AC-HN9CBV2 (Rear) cameras, the system provides clear and stable video recording.

Key Functions

1. Single-Channel Recording

• Records only front/rear view in real time.
• Supports 1080P AHD resolution for both channels.

2. GPS-Tagged Recording

Captures video with GPS coordinates, letting you track exact driving locations.

4. Auto Start & Loop Recording

• Begins recording automatically when a USB drive is inserted into the DVR-dedicated Recording Storage Cable’s USB port.
• Supports loop recording (old files are overwritten by new ones).
• Important: Format the USB drive before first use. If recording fails, reformat and try again.

5. Anti-Glare (Strong Light Suppression)

Maintains clarity when facing bright sunlight or intense night lighting.

• Captures important details such as license plates under challenging conditions.

6. Wide-Angle Coverage

Both cameras feature a 150° viewing angle for broader road coverage.

7. Night Vision

Enhanced low-light performance ensures visibility of license plates, road signs, and garage areas.

8. IP67 Waterproof Rear Camera

• Withstands immersion in up to 1 meter of water for 30 minutes.
• Resists heavy rain and snow, ensuring reliable outdoor use.

9. Real-Time Rear View

Automatically switches to the rear camera feed when the gear is shifted to R (Reverse).

10. Wide Dynamic Range (WDR)

Enhances video quality in backlit or high-contrast environments, capturing finer details.

11. Manual Video Locking

• Protects important footage from being overwritten.
• Locked videos can serve as strong evidence in the event of an incident.

Required Accessories

• ATOTO AC-HN9FR Front Recording Camera (sold separately)
• ATOTO AC-HN9CBV2 Rear Recording Camera (sold separately)

DVR App Integration

The S8 Gen4 comes with a pre-installed DVR application, specifically designed for:

• Connecting and managing front/rear recording cameras.
• Previewing and recording live video feeds.
• Playing back recorded footage for review.

This makes it easier to manage driving safety, monitor video recordings, and secure important evidence directly from the S8 Gen4 Android head unit.

Operation Steps

Step 1: Understand Camera and DVR App Usage

• Scan the QR code below and select AC-HN9FR model to view detailed instructions.

Step 2: Connect USB 3.0 Card Reader with TF Card

• Insert the included 2-in-1 USB cable (for external storage & phone link) into the USB port on the rear panel of the S8 Gen4 head unit.
• Plug a USB 3.0 card reader with TF card (TF card not included) into the USB port of the USB recording storage cable.

Notes:

1. The S8 Gen4 USB port also supports direct connection of a USB 3.0 card reader with a TF card.

2. Recommended DVR setup:

• Connect the USB 3.0 card reader with TF card to the S8 Gen4 via the designated USB port.
• Use the USB recording storage cable (from the 2-in-1 cable) to connect the dedicated DVR.
• This ensures stable data transfer and reliable recording performance.

3. If the card reader is not formatted, a prompt will appear. Tap OK to format. Backup all data first, as formatting will erase existing files.

Step 3: View Video Footage

• Go to Home Screen > App Drawer > DVR App.
• Tap the DVR app icon to view the video footage from the front and rear recording cameras.

Step 4: Switch Front and Rear Camera Views

• Tap the mini window (top-left corner of the screen) to switch views:
  • Front camera → large window
  • Rear camera → small window
• Tap again to swap the display.

Step 5: Review Recordings

• Tap the List icon to access saved content:
  • Recorded videos
  • Captured photos
  • Locked (protected) video files

19.2 DVR CAM

The DVR CAM function works with a USB driving recorder to improve driving safety, capture accident evidence, and record trips.

For the best performance, we recommend pairing your S8 Gen4 with ATOTO's dedicated front and rear recording cameras (AC-FCR04W / AC-RCR04W, sold separately).

Chapter 20 WRC App

The WRC App is a pre-installed wireless rear camera system application that receives and displays real-time video, assisting drivers during reversing and parking maneuvers.

The camera can be mounted on either the front license plate or the rear license plate. The system consists of a wireless camera, a receiver, and the WRC App. Video signals are transmitted wirelessly, eliminating the need for cables. The app displays both reverse camera footage and Live Rear View video directly on the P10’s screen, simplifying installation and improving operational flexibility.

Required Accessory

The WRC function requires the WR2-12HDLR Wireless Backup Camera (sold separately). Please note that future models or updated versions may be released—refer to the latest official documentation.

Display Modes

1. Power-Saving Mode: Used for standard reversing footage; video is displayed temporarily and automatically enters sleep mode after 2 minutes (auto-exits the WRC app).
2. Mirror (Live Rear View) Mode: Continuously displays camera footage, allowing drivers to monitor the area behind the vehicle at any time.

Enter the WRC Interface( Multiple Wake-Up Methods):

• Press the receiver’s WAKE/PAIR button once to wake and enter Power-Saving View. Double-press the button within the WRC interface to switch between Power-Saving and Always-On (Mirror) Mode.
• Use the SmartRemote: press once to open or close the WRC app (Bluetooth pairing required via the system Bluetooth; device name: SmartRemote).

Note: Do not press the SmartRemote repeatedly or too quickly.

• Use voice commands via the DriveChat App (requires DriveChat login and a recorded wake word).
• When already in the WRC interface, tap the screen to wake the display.

Image Adjustments: Flip image vertically, mirror horizontally, adjust parking guide lines, and enable Wide Dynamic Range (WDR) for enhanced visibility.

Status Monitoring: Shows wireless signal strength and camera battery level, with alerts for weak signals or connection issue.

Compatibility: Supports only ATOTO’s approved wireless camera system; third-party cameras are not supported.

Note: For detailed instructions, please refer to the official user manual of the wireless camera system (e.g., WR2-12HDLR User Manual). Model names and numbers may vary, so please ensure you are referring to the correct manual for your specific camera system.

For more detailed information about the wireless camera system, please scan the QR code.

Chapter 21 LumiAuto APP (Ambient Lighting Control)

The LumiAuto App allows you to control the ATOTO CI-FLT01 Interior Footwell Lights (sold separately) for personalized in-car ambient lighting. You can manage lighting effects either from the S8 Gen4 Android head unit (pre-installed LumiAuto app) or your smartphone (download required).

1. Key Features

Lighting Modes

• Solid Color Mode: Choose any color from the full RGB spectrum.

• Multi-Color Mode: Access dynamic effects such as breathing, gradient, or strobe.

Customization & Synchronization

• Adjustable Brightness: Independently set the front and rear brightness levels

• Music Sync: Lights pulse & shift with your music (Bluetooth or local playback)

• Scene-Based Ambience: Save and apply presets for different occasions (e.g., relaxed evening, road trip).

Control Options

• Via Head Unit: Open the LimiAuto app from the S8 Gen4 screen and adjust settings.

• Via Smartphone: Download the LumiAuto app to make remote adjustments & manage saved profiles.

2. Functionality Overview

The LumiAuto app lets you adjust color, brightness, and lighting modes of the CI-FLT01 lights, enhancing your in-car ambiance to match your preferences.

3. Requirements

• Accessory: ATOTO CI-FLT01 Interior Footwell Lights (sold separately).
• Software:
  • S8 Gen4 Head Unit: Pre-installed LumiAuto app.
  • Smartphone: Download the LumiAuto app (Currently optimized for Android; iOS version coming soon.)

4. Setup & Usage

For installation and detailed instructions, scan the provided QR code and select CI-FLT01 model.

Chapter 22 TPMS (Tire Pressure Monitoring System) App

The TPMS App provides real-time monitoring of tire pressure and temperature. If it detects abnormalities such as overinflation, underinflation, or unusual temperature rise, it immediately alerts the driver, helping prevent tire blowouts and improving driving safety.

1. Requirements

• Accessory: ATOTO AC-UTP1 TPMS (sold separately).
• Software: The S8 Gen4 head unit includes a pre-installed TPMS app. Once paired with the AC-UTP1 TPMS, it will continuously display tire pressure and temperature.

2. Functionality Overview

• Real-time monitoring of tire pressure and temperature.
• Automatic alerts in case of abnormal readings.
• Enhanced driving safety and reduced risk of hazardous tire-related incidents.

3. Setup & Usage:

For installation and detailed usage instructions, scan the QR code below and select AC-UTP1 model.

Chapter 23 Torque App

The Torque App is a third-party automotive diagnostic tool for Android, designed to work with OBD II Bluetooth diagnostic interfaces. When installed on the S8 Gen4 Android head unit, it provides real-time data from the vehicle’s ECU (Engine Control Unit), enabling users to monitor vehicle status, perform diagnostics, and analyze performance.

1. Requirements

• Accessory: ATOTO AC-4450 Mini OBD II Diagnostic Scanner (sold separately).
• Software: The S8 Gen4 head unit includes a pre-installed Torque app, which works once paired with the AC-4450 scanner.

2. Functionality Overview

• Monitor engine operating conditions in real-time.
• View live sensor data and system performance.
• Perform fault diagnostics and clear fault codes.
• Analyze vehicle performance trends.

3. Setup & Usage

For installation and detailed instructions, scan the QR code below and select AC-4450 model.

Chapter 24 EIOTCLUB App

EIOTCLUB App is a preinstalled application on the S8 Gen4 Android head unit, designed for on-device management of the EIOTCLUB 4G Nano SIM card—view data usage and plan status, purchase or top up data plans, and manage account details (bind your email address, view order history, obtain receipts). In addition, the 4G Nano SIM card is an accessory for the S8 Gen4 Android head unit; when you receive your S8 Gen4, simply follow the operating instructions to get online with the 4G Nano SIM card.

1. Function Overview (EIOTCLUB APP for EIOTCLUB Easy IoT DATA SIM Card)

(1) View data usage, remaining balance, validity period, and current plan status.

(2) Purchase or top up data plans on the head unit.

(3) Manage account information (bind email, view order history, obtain receipts/invoices).

Note: The UI and available features may vary by app version, region, and account permissions. Refer to what appears on your device.

2. Requirements and Preconditions

(1) S8 Gen4 Android head unit with a cellular module (variant that supports a physical 4G data nano-SIM).

(2) EIOTCLUB data SIM (4G nano-SIM) inserted and active.

(3) Vehicle located in a mobile network coverage area with mobile data enabled.

(4) Set the S8 Gen4’s system time and time zone correctly to ensure accurate billing and plan activation.

Operation Steps:

Navigation Path: Home Screen > APP Drawer > EIOTCLUB

First-Time Use and Activation

Step 01: Before using the EIOTCLUB Data SIM Card for the first time, please read the user manual carefully to ensure proper use.

Step 02: Insert the SIM card and power on. Wait for the system to recognize it (the status bar should show a mobile network icon with signal bars).

Step 03: Tap to open the EIOTCLUB app. On the home page, view data usage, first-time top-up offers, and standard top-up options. (Note: The screenshots here are for reference only; please refer to the actual device.)

Step 04: Tap the first-time top-up offer. In the pop-up, bind your email and tap “OK” to proceed to the purchase page. (Note: The screenshots here are for reference only; please refer to the actual device.)

Step 05: On the purchase page, tap Buy and choose your payment method. Before you confirm payment, a reminder about the auto-renewal feature will appear.(Note: The screenshots here are for reference only; please refer to the actual device.)

Step 06: Enter your bank card details to complete the payment. (Note: The screenshots here are for reference only; please refer to the actual device.)

Step 07: Payment Success

Step 08: View data usage, remaining balance, validity period, and current plan status. (Note: The screenshots here are for reference only; please refer to the actual device.)

Common Operations

1. Usage & Orders: Check remaining data, expiry date, order history, and receipts/invoices.
2. Account Management: Change or verify the bound email; view the ICCID (SIM card number), etc.

Usage & Compliance Recommendations

1. Driving Safety: Perform top-ups, settings, and checks only when parked and it is safe to do so.
2. Privacy & Billing: Bind a frequently used email and keep order records and receipts.
3. Region & Roaming: Availability and rates depend on the plan and region; confirm coverage and rates before cross-border use.
4. Support: If issues occur, use the in-app Support or official channels.

Chapter 25 FindApps

FindApps is an exclusive app store designed specifically for ATOTO Android devices, providing a curated selection of apps that are fully compatible with ATOTO units. Unlike the general Google Play Store, FindApps ensures app reliability and seamless operation on your head unit.

Operation Steps

Step 1: Launch FindApps

• Go to Home Screen > App Drawer > FindApps.
• Tap the app icon to open it.

Step 2: Install Apps

• Browse the app list to find desired apps.
• Tap Install > Retrieve to download and install the app on your S8 Gen4 head unit.

Step 3: Manage Apps

• Go to Manage page.
• Scroll through the installed apps list to:
  • Open an app
  • Uninstall an app
  • Update an app
• Perform the desired action to maintain your head unit's software.

Chapter 26 Web Resources App

Web Resources App is a built-in web portal on the S8 Gen4 Android head unit, designed to provide quick access to information, resources, and support related to your device. By connecting to the internet (Wi-Fi, mobile hotspot, etc.), the app allows convenient access to firmware updates, tutorials, and support services.

Key Features

1. Download apps and update firmware effortlessly.
2. View all items included in your package.
3. Access guided installation and connection video tutorials.
4. Receive instructions in your preferred language (15 options available).
5. Apply for a warranty with a single click.

Operation Steps

Step 1: Launch Web Resources App

• Go to Home Screen > App Drawer > Web Resources App.
• Tap the Web Resources app icon open the interface.

Step 2: Scan the QR code

• Use your smartphone to scan the QR code displayed on the app interface.
• You will be directed to the corresponding page on the Eproductcare website:http://www.eproductcare.com

Chapter 27 BT Lock(Screen Lock)

The Screen Lock feature protects your S8 Gen4 Android head unit from unauthorized access and safeguards personal data such as navigation history and account information. It supports two locking methods: Password Lock and Bluetooth Lock/Unlock.

1. Password Lock

Unlock the screen by entering a preset password.

Operation Steps

Step 1: Navigate to Home Screen > APP Drawer > BT Lock

Step 2: Toggle the ON/OFF button to open the Screen Lock Settings interface.

Step 3: Set a password:

• Enter the Current Password
• Set a New Password
• Confirm the New Password
• Tap Save

Note: The initial password is 0123.

2. Bluetooth Lock/Unlock

Automatically locks or unlocks the screen based on the proximity of a paired Bluetooth device (e.g., your mobile phone).

• Bluetooth Lock: The screen locks automatically when the paired device disconnects.
• Bluetooth Unlock: The screen remains unlocked when a paired device is nearby.

Operation Steps

Step 1: Navigate to Home Screen > APP Drawer > BT Lock

Step 2: Toggle ON/OFF button to open the screen lock settings interface.

Step 3: Tap Unlock with Bluetooth to see the list of paired phones.

Step 4: Add one or more paired phones from the list. When a paired phone is nearby, the screen will unlock within 1–2 seconds.

Chapter 28 Fast Boot

The Fast Boot function is designed to speed up the system’s entry into the main interface after the vehicle is started, significantly reducing boot-up time.

28.1 How Fast Boot Works

1.Low-Power Sleep Mode

1. Activates approximately 5 minutes after the engine is turned off and the key is removed (or upon opening the driver's door, depending on the car).
2. Enables the S8 Gen4 Android head unit’s system to wake up in under 2 seconds with the ACC power signal.

2.Battery Efficiency

1. Operates on less than 10mA, allowing a typical car battery to last between 160-250 days in this mode.
2. Automatically transitions to full power-off mode if idle for more than 168 hours (7 days), reducing the battery drain to just 2.5%-4%.

3.Recharging and Automatic Shutdown

1. Daily driving recharges the battery, preventing the system from an automatic shutdown.
2. After parking for over 7 days, system start-up will take 20-25 seconds.

4. Proven Reliability

Developed across over 1.5 million devices.

28.2 Cautions for Fast Boot

1. To ensure Fast Boot functions correctly, it's crucial to wire the “12v Ignition/ACC” and “12v Constant Power/Battery”correctly in the power harness. For details, please refer to the “Connection” section under “Installation”. (Navigation Path: Navigate to Eproductcare > Car Stereo > S8 Gen4 > Specific Model: S8 Gen4XXX > Installation)
2. Incorrect wiring may prevent the system from entering sleep mode, leaving the screen on, or interrupting the hibernation process, leading to a 20-30-second restart time.

Chapter 29 Network Settings

This chapter introduces the network settings function of the S8 Gen4 Android head unit, including Wi-Fi(WLAN), Data Saver, Mobile Network, Hotspot, and VPN, to help you optimize network connection and ensure stability and security during driving.

29.1 Wi-Fi (WLAN) Settings

WLAN (Wireless Local Area Network), commonly known as WiFi, allows the S8 Gen4 Android head unit to connect to the internet via wireless networks. Benefits include:

1. High-Speed Internet Access – Connect to WiFi networks at home, office, or public places.
2. Data Saving – Reduce mobile data usage (4G) and save costs.
3. Software Updates – Some system updates require WiFi to prevent large mobile data consumption.

Notes:

• Supports 2.4GHz & 5GHz dual-band WiFi (depending on hardware configuration).
• Supports WPA/WPA2/WPA3 security protocols for safe connections.

How to Access to Wi-Fi (WLAN)

Navigate to Settings > Network & Internet > Internet

For specific steps on Wi-Fi network settings, please refer to section 5.1 in this manual.

29.2 Data Saver Settings

The data saver feature allows you to "Permit" or "Block" background app data usage to prevent unnecessary data consumption.

Note: Only applies to mobile networks (4G), without affecting Wi-Fi connections.

Operation Steps:

Step 01: Access to Data Saver

Navigate to Settings > Network & Internet > Data Saver

Step 02: On the Data Saver page

Toggle the "ON/OFF" button to ON to enable Data Saver

Step 03: Enable Data Saver for Selected Apps

Toggle the ON/OFF button beside selected apps to ON to allow unrestricted data access while blocking others.

29.3 Mobile Network Settings

Using the built-in 4G Nano SIM card to provide cellular network connection, suitable for environments without Wi-Fi.

Operation Steps

Step 01: Insert the Nano SIM card

For detailed steps, refer to Section 5.2 in this manual.

Step 02: Access the Mobile Network

Navigate to Settings > Network & internet > SIMs

Step 03: Enable Mobile Data

On the Mobile Network page, toggle the ON/OFF button to ON to enable mobile data. Toggle the ON/OFF button for Roaming to ON if roaming is needed.

Step 04: Manage Mobile Data Usage

Tap App Data Usage to open the corresponding page:

Enable Set Data Warning and set the threshold (e.g., 2GB) to receive warnings.

Enable Set Data Limit and set the limit (e.g., 5GB) to restrict data usage.

29.4 Hotspot Settings

The S8 Gen4 features a built-in 4G LTE Cellular module, enabling your S8 Gen4 Android head unit to function as a mobile hotspot.

Operation Steps:

Navigate to Settings > Network & internet > Hotspot & tethering > Wi-Fi hotspot

For specific steps on Hotspot Settings, please refer to section 5.1 or 5.2 in this manual.

Chapter 30 Gar Settings

30.1 General

The General panel of the S8 Gen4 Car Setting App allows users to customize essential driving-related functions, touch controls, steering wheel buttons, display preferences, and system behavior. This section provides an overview of each configurable option and its purpose.

AUX Lens Mirror: This option allows you to flip or mirror the AUX video input display to match the installation orientation of an external camera or AUX device.

Available modes:

• Normal – No mirroring
• Left ↔ Right – Horizontal flip
• Up ↕ Down – Vertical flip
• Left ↔ Right + Up ↕ Down – Full mirroring for complex installations

Use this setting when the AUX camera or video feed appears reversed or incorrectly oriented.

SWC Type: Select the steering wheel control mode based on your vehicle’s wiring system.

• Learning Mode – For universal or analog steering wheel control systems. Users can manually assign steering wheel buttons (volume, mute, next/previous, etc.).
• Special Mode – For vehicles using a digital or CANBUS-based SWC protocol.

Multi-Finger Touch Function: Enable or disable multi-finger gesture recognition on the touchscreen. When enabled, users can perform supported gestures such as:

• Pinch to zoom
• Multi-finger swipes
• Multi-touch control in compatible apps

Shortcut Touch (Floating Control Button): Enables a floating shortcut panel on the screen for quick access to essential functions.

Available shortcuts include:

• Volume +
• Volume –
• Mute
• Home
• Small window (floating mini-view)
• Screen off
• Back

Key Tone: Enable or disable sound feedback when touching the screen.

• ON: A click sound plays for touch actions
• OFF: Silent operation

USB Tethering: Allows the S8 Gen4 to share the mobile data connection of your smartphone via USB cable.

Useful when:

• Wi-Fi hotspot is unavailable
• Bluetooth tethering is unstable
• A wired connection is preferred for speed or stability

Headlight Detection

Can Watch Video While Drive: Controls whether video playback is allowed while the vehicle is in motion.

• Default: OFF (videos are blocked for safety)
• ON: Allows watching videos while driving (not recommended)

⚠ Warning: Viewing videos during driving may cause distraction and increase the risk of accidents.

30.2 Reverse

The Reverse panel in the S8 Gen4 Car Setting App provides options for configuring the rear camera display, reversing guidelines, delay behavior, and video format. These settings help ensure safe and accurate reversing performance based on your vehicle and camera installation.

Rear Mirror (Rear Camera Image Mirroring): Allows you to adjust the rear-camera image orientation to match your installation and driving habits.

Available modes:

• Normal – No mirroring
• Left ↔ Right – Horizontal flip
• Up ↕ Down – Vertical flip
• Left ↔ Right + Up ↕ Down – Full flip for specific installation requirements

Use this when the rear-view image appears reversed or misaligned.

Dynamic Reversing Auxiliary Line Switch: Enable or disable dynamic trajectory guidelines, which move according to the steering wheel angle.

• ON: Guiding lines bend dynamically based on steering input
• OFF: Only static guidelines appear

Dynamic lines help drivers better judge path and distance when turning while reversing.

Reverse Line: Enables the static reversing guidelines displayed on the screen when the vehicle shifts into reverse.

• ON: Shows fixed-distance guidelines
• OFF: Hides all guidelines

Useful when your vehicle already has built-in OEM guidelines or an aftermarket camera with its own overlay.

Delayed Reversing: Sets how long the S8 Gen4 should wait before entering the reverse-camera interface after the vehicle is shifted into reverse.

Selectable delay times:300ms/700ms/1s/2s/3s/4s

This feature is useful for vehicles where the reverse signal is slightly delayed or when users prefer a smoother transition.

Reverse Mode Selection (Camera Video Format): Configures the video format used by the rear camera. Available options include:

• AUTO (Recommended) – Automatically detects the correct format
• NTSC
• PAL
• AHD
• TVI

If the rear-view image appears distorted, black-and-white, unstable, or with rolling bars, try selecting the correct format manually.

30.3 Display

The Display section allows users to adjust the visual appearance, brightness, wallpaper, screensaver, and navigation bar layout of the S8 Gen4 Android head unit. These settings help improve visibility, personalize the interface, and enhance usability in different driving environments.

Navigation Bar Mode: You can choose the position of the on-screen navigation bar based on the vehicle’s driver orientation.Left rudder – Recommended for left-hand-drive vehicles.

Right rudder – Recommended for right-hand-drive vehicles. This ensures easier reach and more comfortable operation while driving.

Display Mode: Choose how the system’s interface appears under different lighting conditions. Options include:

• Light color mode – Bright interface suitable for daytime use
• Dark mode – Dimmer interface ideal for nighttime driving
• Headlight signal – Automatically switches to dark mode when vehicle headlights are turned on
• Timing start – Automatically switches display mode based on scheduled times

These modes help reduce glare and improve screen visibility.

Brightness Adjustment: Adjust the screen brightness using the slider.

Wallpaper Settings: Tap to enter the wallpaper selection page and choose from built-in wallpapers (3D Scenes) to personalize the home screen.

ScreenSaver Settings: You can customize the screensaver style and activation time.

Font Setting: You can adjust the overall font size of the system interface:

30.4 Sound

The Sound section allows users to manage different audio behaviors of the S8 Gen4 Android head unit, including media volume, navigation volume mixing, reversing volume reduction, phone call volume, and system default volume settings.

• Media Volume When Navigation Is Playing: This feature adjusts how much the media volume is reduced when navigation voice guidance is played.
• Media Volume When Reversing: Adjust how much the media volume decreases when the vehicle is in Reverse gear.
• Media Volume: Use the slider to adjust the current media playback volume. This setting affects music, video, radio, and all other media outputs.
• Navi Gain: Adjust the gain (volume boost) for navigation voice prompts.
• Telephone Volume: Adjust the call volume during phone calls.
  • This only affects call audio
  • It does not affect media volume or system volume
• Default Volume: This option sets the startup media volume after the device is rebooted.

System Default Volume Logic

1. If Default Volume is set to 20, and you change Media Volume to any other number, after power-off and reboot, Media Volume will return to 20.
2. If the Default Volume setting matches the current Media Volume, then after reboot, both values remain the same.
3. For example:
   1. Default Volume = 40
   2. Media Volume manually set to 40
   3. After reboot → Media Volume stays at 40

This prevents unexpected loud volumes on startup and ensures a consistent audio experience.

30.5 System

The System Settings section allows you to configure core system-level options on the S8 Gen4 Android head unit, including date & time, input methods, language, factory reset, and system updates. These settings ensure the device operates according to the user’s regional preferences and can be restored or updated when needed.

30.5.1 Date & Time Settings:

Configure the system clock, date, and time zone.

Available options:

• Set Date and Time – Manually adjust the current date and time.
• Time Zone – Select your preferred time zone (e.g., GMT+08:00).
• Use Default Language Region – Automatically applies date and time formats based on the selected language/region.
• Use 24-hour Clock – Enable or disable the 24-hour display format.
• Synchronize Network Time – Automatically syncs time via network connection.
• Synchronize GPS Time – Syncs time using GPS signals (if supported).

These settings ensure accurate time display for navigation, apps, logs, and system functions.

30.5.2 Language Settings

Choose the display language for the head unit.

• Tap Language settings
• Select your preferred system language from the list (e.g., English, Spanish, French, etc.)

30.5.3 Input Method Settings

Select and configure the keyboard used for typing.

• Tap Input method settings
• Choose from available keyboards (e.g., Gboard)
• Customize keyboard preferences if supported

30.5.4 Clear All Data (Factory Reset)

Restore the system to factory default state.

• Tap Clear all data > Reset
• This will erase all personal data, installed apps, Wi-Fi settings, Bluetooth pairings, and system customizations.

Warning: Factory reset is irreversible. Back up important data before performing a reset.

30.5.5 Wireless Update

Check for and install new firmware updates online.

• Requires an active Wi-Fi or mobile network connection.
• Ensures your system receives the latest features, improvements, and bug fixes.

30.6.6 Local Update

Update the S8 Gen4 system using a local firmware package stored on USB storage.

• Copy the update file (provided by ATOTO) to a USB flash drive.
• Insert the USB flash drive into the head unit.
• Follow on-screen prompts to complete the upgrade.

This is useful when wireless updates are unavailable or when manually applying a specific firmware version.

Chapter 31 Settings

31.1 Apps

The Apps section allows users to manage all applications installed on the S8 Gen4 Android head unit. This includes viewing installed apps, setting default apps, checking unused apps, and configuring special app permissions for enhanced control and personalization.

31.1.1 All Apps

Displays a complete list of all applications installed on the S8 Gen4 Android head unit.

Function:

• View all installed apps
• Check storage usage, permissions, notifications, and data usage per app
• Uninstall or disable apps (if supported)

Useful when managing system performance or troubleshooting application issues.

31.1.2 Default Apps

Allows you to set which application should be used by default for specific actions. Examples:

• Set Chrome as the default browser: all links will automatically open in Chrome
• Choose a default navigation app
• Select a default phone or messaging app

Function: Ensures consistent behavior when opening links, files, or performing certain actions.

31.1.3 Unused Apps

Shows applications that have not been used for an extended period.

Function:

• Helps identify apps you may no longer need
• Can be used to free storage or improve system efficiency

If there are no unused apps, this page will display “0 unused apps”.

31.1.4 Special App Access

Provides advanced permissions and control options for specific apps.Possible Permissions Include:

• File Access: Allow apps to read/write files
• Display Over Other Apps: Enable floating windows or on-screen overlays
• Picture-in-Picture Mode (PiP): Allow apps to run in a mini-window
• Unrestricted Data Usage: Allow background data consumption even in data saver mode
• Modify System Settings: Allow apps to adjust system-level settings

Function: Grants enhanced capabilities to selected apps, improving usability for navigation tools, controllers, and video players.

31.2 Storage

The Storage page shows how the S8 Gen4 head unit’s internal storage is being used and allows you to free up space when necessary.

• View Storage Usage: Displays total storage, used space, and category breakdown (Apps, System, Images, Audio, etc.).
• Storage Manager: Helps automatically clean up unnecessary data when enabled.
• Free Up Space: Opens the Files app so you can delete large or unused files to reclaim storage.

31.2 Accessibility

The Accessibility page provides tools to improve visibility and interaction based on your preferences.

• Display Size and Text: Adjust the size of on-screen text and display elements for easier viewing.
• Color and Motion: Modify color settings, contrast, and animation effects to improve readability and comfort.
• Extra Dim: Further reduces screen brightness beyond the normal minimum level for nighttime or low-light use.
• Magnification: Enable screen magnification to zoom in on text or interface elements for better visibility.
• Timing Controls: Adjust time-related interaction settings, such as touch-and-hold delay or gesture timing.
• System Controls: Access additional assistive options for simplified interaction with the system.

31.3 Location

The Location page allows you to manage how apps use the device’s location services.

• Use Location: Turn location services ON/OFF for the entire device.
• Recent Access: View apps that recently accessed your location (e.g., Maps, Google).
• App Location Permissions: Check which apps have permission to access your location.
• Location Services: Manage system-level location settings.

31.4 Passwords & accounts

The Passwords & Accounts page allows you to manage all accounts and saved passwords on the device.

Key Functions

• View Saved Passwords

Check passwords stored by Google Password Manager.

• Autofill Service

Manage the service (Google) that automatically fills in passwords and forms.

• View Linked Accounts

See all accounts currently signed in on the device (e.g., Google accounts).

• Add Account

Add new accounts such as Google, email, or other supported services.

Chapter 32 Technical Specifications

• Operating System: Android 13
• SoC Chipset:

CPU: MediaTek MT8768 Octa-Core (4 × Cortex-A53 @ 2.2GHz + 4 × Cortex-A53 @ 1.6GHz)

GPU: IMG GE8320

• Memory: 4GB RAM + 64GB ROM
• Wi-Fi Network:

Wi-Fi Standard: IEEE 802.11 ac/a/b/g/n

Wi-Fi Band: 2.4GHz, 5GHz

Mobile Network(Frequency Bands Supported):

2G: GSM 850 / GSM 900 / GSM 1900

3G (WCDMA): Band 1 / Band 2 / Band 4 / Band 5 / Band 8

4G : Band 1 / Band 2 / Band 4 / Band 5 / Band 7 / Band 8 / Band 12 / Band 13 / Band 17 / Band 19 / Band 25 / Band 26 / Band 38 / Band 41

• Display Type: QLED

7-inch QLED Resolution: 1280 × 720

9-inch QLED Resolution: 1280 × 800

10.1-inch QLED Resolution: 1280 × 800

11.5-inch QLED Resolution: 2000 × 1200

12.5-inch QLED Resolution: 1920 × 1200

• Screen Brightness: 550 cd/m²
• Bluetooth:

Bluetooth Version: Bluetooth 4.1

Protocol: HFP、HSP、A2DP、AVRCP、PBAP

Channel Output: Stereo, Mono

Support Bluetooth BLE Connection

• Preamplifier

Preamplifier Output: MAX 4*45 W / RMS 4*24 W;

Speaker Impedance: 4–8Ω

Frequency Response: 20 Hz – 22,000 Hz

• DSP Acoustics

EQ Bands: 32 Bands

EQ Frequencies (Hz):

20/24/29/36/45/53/65/80/100/120/140/170/210/260/320/390/470/570/700/850/

1.0k/1.3k/1.6k/1.9k/2.3k/2.8k/3.4k/4.1k/5.0k/ 6.1k/7.5k/9.0k/11.0k/14.0k/17.0k/20.0k (Hz)

Gain Adjustment : -10/-9/-8/-7/-6/-5/-4/-3/-2/-1/0/1/2/3/4/5/6/ 7/8/9/10 (dB)

Preset EQ Modes: Standard / Rock / Soft / Classic / Pop / Hall / Jazz / Cinema

• Media Playback

Audio: D/A Converter: 24Bit

Audio Decode: WAV, MP3, MP2, FLAC, APE, AAC

Video Decoding:

- H.263/H.264/DIVX4-6/XVID Decoder: 1080p@30fps

- MPEG-4 Decoder: 1080p@30fps

- MPEG-2 Decoder: 1080p@30fps

- VP8 Decoder 1080p@30fps

- VP9 Decoder 720p@30fps

- HEVC/H.265 Decoder: 720p@30fps

• GPS

GNSS (Global Navigation Satellite System): Supports GPS/BeiDou/Glonass/Galileo

Position Ability:

-163 dBm hot start sensitivity

-148 dBm cold start sensitivity

-151 dBm warm start sensitivity

Full A-GPS Capability: E911/SUPL/EPO/Hot Still

Satellite Channel: 20 Channels

Positioning Accuracy: < 10m

• Output & Input

USB Data Interface: 2-4 USB Interfaces

Power Output: 5V, 500-800mA during data transfer

Audio Out:

4 x RCA Out (4V/10kΩ): Labeled as <FL>/<FR>/<RL>/<RR>

1 x RCA Subwoofer Out(4V/10kΩ): Labeled as <SUB>s

Front View Camera Input: 1 x FCAM Video Input (1Vp-p/75Ω): Labeled as <FCAM>

Rear View Camera Input: 1 x RCAM Video Input (1Vp-p/75Ω) : Labeled as <RCAM>

Digital Audio Output:

1 x SPDIF Fiber Output, Labeled as <SPDIF>;1x Coaxial

Digital Audio output labeled as <COAXIAL>

• General

Operating Voltage: 12V DC (Car Battery)

Rated Current: 15A

Operating Temperature Range: –30°C to +70°C (–22°F to +158°F)