ATOTO

AC-HD21F 1080P Camera

—— DVR Function Guide for CB7 Series AI Box

Applicable Systems:

Compatible with all CB7 Series models equipped with a 2.5mm AV Port

(CB7SATN models not supported)

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.

Copyright Statement

The copyright and related intellectual property rights of ATOTO brand Camera 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 Camera 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.  About this Manual

To ensure proper use of your AC-HD21F 1080P camera, please read this user manual

carefully and fully understand its contents before operation.

Notes:

● The illustrations and interface shown in this guide are for reference only and may differ from the actual display.

● This guide does not cover all possible scenarios. If you need assistance, please contact ATOTO Customer Support.

2.  Operation Warnings

For your safety and to ensure proper performance of the AC-HD21F 1080P camera, please read and follow the warnings below:

① Do Not Install in a Location That Obstructs Driving

Do not mount the camera where it blocks the driver's view or interferes with airbag deployment.

② Keep the Camera and Connectors Dry

Do not expose the camera, extension cable, or AV plug to water, rain, or high humidity.

Moisture may cause malfunction or permanent damage.

③ Do Not Disassemble or Modify the Camera

Unauthorized disassembly, puncturing, or modification may lead to electric failure and void the warranty.

④ Do Not Use While Driving

Adjusting the camera angle or settings while driving may cause distraction and increase the risk of an accident.

⑤ Use Only the Provided or Recommended Cables

Using non-compatible cables may cause unstable power/connection or damage to the AV port.

⑥ Handle the Lens Carefully

Avoid touching the lens with fingers. Dust, oil, or scratches may affect video quality.

⑦ Check Cable Routing Regularly

Ensure the extension cable does not interfere with pedals, steering, seat movement, or airbags.

⑧ Avoid Sudden Connection During Power-On

Connecting the camera while the CB7 is running may cause voltage instability. If done accidentally, restart the CB7.

⑨ Follow Local Laws

Recording audio or video in some regions requires consent from passengers.

Make sure the use of the camera complies with local privacy and recording laws.

Chapter 2 Camera Overview

2.1 AC-HD21F Camera Installation

Step 1: Choose a Mounting Location

Mount the AC-HD21F camera at a position suitable for your monitoring or recording needs:

• Front windshield
• Rear windshield
• Any other DIY location appropriate for capturing the desired view

Step 2: Connect the Camera to CB7

Attach the AC-HD21F camera to the extension cable, then insert the extension cable’s plug into the 2.5mm AV Port of the CB7.

Step 3: Adjust the Camera Direction

Rotate the AC-HD21F lens to the desired angle.

The rotatable lens allows flexible positioning—toward the road, cabin, or any angle required for your setup.

Step 4: Insert a TF Card into the CB7

To enable video recording, insert a TF card (up to 256GB, U3 recommended) into the CB7.

Recording will not begin if no TF card is inserted.

Important Notes：

• For stable operation, connect the AC-HD21F camera before powering on the CB7. If the DVR is connected after the CB7 is already running, please restart the device to avoid instability caused by sudden voltage fluctuations.
• Some vehicles provide less than 1A of power through the wired CarPlay/Android Auto USB port.

For these vehicles, it is recommended to use the Y-shaped power cable included in the CB7 package and connect it to the cigarette lighter socket or a fast-charging USB port (e.g., 5V/2A) for stable power supply.

Chapter 3 Camera System Overview

CB7 features an upgraded Camera System, which supports both wired and wireless cameras.

Open the WDVC app to enter the Camera System. The system automatically detects the connected camera and allows you to select the corresponding secondary application.

The Camera System currently supports:

• Dashcam (DVR) – Continuous video recording and file management.
•  Wireless Reverse (WRC) – Low-latency wireless rear-view preview with smart guidelines.

3.1 DVR App Recording Interface 

The DVR interface provides access to camera settings, recording controls, playback, and file management. Below is a breakdown of each function on the screen.

3.1.1 Bottom Function Bar

① Record / Stop Recording

Start or stop video recording.

② File List

Opens the DVR file library to browse video clips, photos, and locked videos.

③ Snapshot

Takes a still photo at any time, even during recording.

④ Lock Recording Clip

Locks the current video segment to prevent it from being overwritten.

⑤ Settings

Opens the advanced DVR settings menu.

3.1.2 Settings Menu

The Settings menu allows you to configure video recording quality, storage behavior, display mode, and camera orientation. Below is an overview of each setting.

Resolution:

Choose between 720P or 1080P recording.

Display Settings:

• Fill – Fills the entire screen.

• Fit – Maintains aspect ratio and fits within the screen.

Flip (Image Rotation)

This function adjusts the image orientation. Available options: 0°, 90°, 180°, 270°.

Loop Recording Duration:

Select the length of each recording segment: 1 min, 3 min, 5 min, 10 min.

Mirror:

• ON – Mirrors the video horizontally.

• OFF – Normal view.

Format SD Card:

Tap Confirm to format the inserted TF card.

Warning: Formatting will erase all data.

Vision AI Hub:

Switch between supported camera applications within the Camera System.

• DASHCAM (DVR)

• WIRELESS REVERSE (WRC)

3.1.3 File List Management

Opens the DVR file library, where you can browse and manage all recorded files. The library is organized into three categories:

① Videos — Loop-recorded clips

② Photos — Snapshots

③ Locked Videos — Protected clips

Within the File List interface, you can:

• Play selected videos；
• View individual photos；
• Lock or Unlock specific video clips；
• Delete selected files or delete all files at once.

This interface functions similarly to a gallery, making it easy to review, manage, and protect your DVR recordings.

3.2 DVR Function Usage

3.2.1 Cabin Monitoring

Records the vehicle interior—useful for kids, pets, rideshare driving, or cabin oversight.

3.2.2 Dashcam Recording

Captures forward-facing road footage for safety, evidence collection, and incident documentation.

3.2.3 Remote LiveView

Remote LiveView allows you to view the live DVR camera feed on your smartphone via the SSHub service, enabling real-time visual sharing while the vehicle is in use.

Prerequisites

Make sure you are signed in to both SSHub and DriveChat.

For detailed instructions, refer to Sections 7.2.2 and 7.2.3 of the CB7 User Manual.

3.2.3.1 How to Start Remote LiveView

1. Initiate Remote Viewing from Your Phone

On your smartphone, tap the “Camera” icon in the top-left corner, then tap the center button to send a remote viewing request.

2. Authorize on the CB7

The CB7 will receive a remote viewing request notification.

Tap Accept on the head unit to start streaming the DVR camera's live video feed to your smartphone in real time.

Privacy Notice

Remote LiveView can only be activated after explicit authorization on the CB7.

If the request is not approved on the head unit, remote viewing will not start, ensuring privacy protection for all occupants.

3.2.3.2 Remote LiveView Interface – Icon Description (SSHub App)

① End Remote LiveView

Tap to end the Remote LiveView session and disconnect the live stream.

②Mute / Unmute Audio

Toggles audio playback from the remote DVR camera on or off.

③Snapshot

Captures a still image of the current live video frame and saves it to your phone.

④Video Recording

Starts or stops recording the live video stream on your phone during Remote LiveView.

⑤Resolution Selector

Displays the current streaming resolution.

Tap to switch between supported resolutions (availability depends on network conditions).

⑥Fullscreen Mode

Switches the live video view to fullscreen mode for an immersive viewing experience.

⑦Voice Talk

When activated, your voice is sent to the CB7 side, allowing you to speak to occupants inside the vehicle.

Note:

Remote LiveView is one-way video streaming.

The CB7 displays only the camera feed and does not show video from the smartphone.

Chapter 4 Usage Notes

①DVR Camare Input vs. HDMI IN (Mutually Exclusive)

The DVR Camare video input and HDMI IN functions cannot be used at the same time.

Use DVR mode for recording, or switch to HDMI IN to view external video sources, depending on your needs.

② Automatic Recording:

Once initial setup is completed, the DVR will automatically begin recording every time the vehicle is started and the CB7 powers on. No manual action is required.

③ Auto-Exit of Preview Screen:

When viewing the live preview in the DVR app, the interface will automatically exit to the home screen after 1 minute of inactivity.

Recording continues in the background.

④ Split-screen Not Supported:

The DVR app does not support split-screen mode.

⑤ Manual Lock Required:

The Lock Recording Clip function does not lock clips automatically.

Users must manually tap the lock icon to protect key footage from being overwritten.

Chapter 5 Technical Specifications