1. Introduction
Thank you for choosing the BQCC 7805C Vehicle Bluetooth MP5 Player. This manual provides detailed instructions for the safe installation, operation, and maintenance of your new car multimedia system. Please read this manual thoroughly before using the product and keep it for future reference.

2. Safety Information
To ensure safe operation and prevent damage, please observe the following:
- Power Supply: This unit is designed for a 12V DC negative ground electrical system. Do not connect it to other voltage systems.
- Wiring: Ensure all wiring is correctly connected according to the diagrams. Incorrect wiring can cause damage to the unit or vehicle.
- Installation: If you are unsure about the installation process, seek professional assistance.
- Operation: Do not operate the unit in a way that distracts you from driving. Always prioritize road safety.
- Temperature: Avoid exposing the unit to extreme temperatures or direct sunlight for prolonged periods.
3. Package Contents
Please check the contents of your package upon receipt:
- BQCC 7805C MP5 Player Unit
- Power Cord
- Electrical Tape
- Removal Tools (Disassembly Kit)
- Instruction Manual (this document)
- Remote Control
- Optional: 4 LED Rear View Camera (if purchased with the camera option)

4. Setup and Installation
4.1. Before Installation Test
Before installing the unit in your car, it is recommended to test it first. Due to potential impacts during transit, testing ensures the unit is functional.
- Connect the red and yellow wires of the power cord together to the positive (+) terminal of a 12V DC car battery.
- Connect the black wire of the power cord to the negative (-) terminal of the battery.
- Wait for 10 seconds.
- Press each button on the unit to check if it powers on and functions normally. If it does, the unit is ready for installation. If not, re-check connections and contact support if the issue persists.
4.2. Installation Step Description
- Separate the Iron Frame: Carefully detach the metal installation frame from the main unit.
- Insert the Iron Frame: Slide the iron frame into the car's radio installation slot.
- Fix the Iron Frame: Secure the iron frame to the car's dashboard using screws.
- Press the Main Unit: Gently push the main unit into the fixed iron frame until it snaps securely into place.
4.3. ISO Plug Wiring Instructions
The unit uses a standard ISO connector. Ensure all connections are secure and correct to prevent damage or malfunction. There are two versions of the B jack (B1 or B2).

ISO Connector B (Power/Control)
- Yellow (BATTERY): Connect to constant +12V power supply. This maintains memory settings.
- Red (ACC): Connect to +12V ignition switch (switched power).
- Black (GND): Connect to vehicle chassis ground.
- Blue (ANT): Connect to power antenna or amplifier remote turn-on.
- Green (ILLUMINATION) (B2 only): Connect to vehicle illumination circuit.
- Brown (KEY) (B2 only): Connect to steering wheel control input.
- Pink (REVERSE) (B2 only): Connect to reversing camera trigger (+12V when reverse gear is engaged).
- Orange (BRAKE) (B2 only): Connect to parking brake cable (for video playback safety).
ISO Connector A (Speakers)
Connect speaker wires as follows. Ensure speaker cables are not grounded, shared, or touching other lines to prevent sound distortion or damage.
- White / White/Black Striped: Front Left Speaker (+ / -)
- Gray / Gray/Black Striped: Front Right Speaker (+ / -)
- Green / Green/Black Striped: Rear Left Speaker (+ / -)
- Purple / Purple/Black Striped: Rear Right Speaker (+ / -)
4.4. RCA Plug Description
The unit features RCA ports for audio/video input and output. There are two versions of the heat sink/RCA panel (4-hole or 6-hole), depending on the specific unit received.
Version 1 (4-Hole RCA)
- Right Audio Output: For external amplifier.
- Left Audio Output: For external amplifier.
- Reversing Camera Input: Video input for rear view camera.
- Video Output: For external monitor.
- Radio ANT: Antenna input.
Version 2 (6-Hole RCA)
- Video Output 1 & 2: For external monitors.
- MIC Input: For external microphone.
- Left Audio Output: For external amplifier.
- Right Audio Output: For external amplifier.
- CVBS Input: Composite video input.
- Radio Antenna: Antenna input.
- Reversing Video Input: Video input for rear view camera.
4.5. Reversing Camera Installation Method
If you have an optional rear view camera, connect it as follows:
- Connect the camera's video output cable to the CAMIN (Reversing Camera Input) RCA port on the unit.
- Connect the camera's power wire (red) to the vehicle's reverse light positive (+) wire.
- Connect the camera's ground wire (black) to the vehicle's chassis ground.
- Connect the pink (REVERSE) wire from the unit's ISO harness (B2) to the vehicle's reverse light positive (+) wire. This triggers the unit to switch to camera view when reverse gear is engaged.
Important: If a camera is not installed, do not connect the REVERSE/BACK cable to any power source, as the unit may automatically enter reverse mode, causing malfunction.

5. Operating Instructions
5.1. Front Panel Controls
The front panel provides direct access to various functions:
| Icon/Button | Function |
|---|---|
| ⏻ | Power ON/OFF (short press to turn on, long press to turn off) |
| ✆ | Answer calls or make calls |
| ✆ (crossed) | End call |
| ⏚ | Switch folder to play |
| ⌂ | Return to home page |
| ⏮ | Previous track |
| ⏭ | Next track |
| ⏯ | Play / Pause |
| ▲ | Previous track, or move up in menus |
| ▼ | Next track, or move down in menus |
| ⎚ | Switch the screen to an external monitor |
| ♫/⏵ | Switch between music and videos |
| ↶ | Confirm play / Enter |
| ↩ | Return button |
| ⏏ | USB disk reading and playing |
| ⏦ | USB charging |
| ⌂ | Remote control signal receiving window |
| TF | TF card slot |
| MODE | Switch function mode |
| BAND | Return to radio interface; switch FM1-FM2-FM3 bands |
| AMS/APS | Automatically search and store radio stations |
| A.V. | Switch music/video source |
| MUTE | Mute on/off |
| CH+ / CH- | Channel Up / Channel Down |
| VOL/SEL | Volume +/-; sound effect settings (press to enter) |
| LIST | Show file list |
| RPT | Play repeatedly (repeat one/all) |
| RDM | Shuffle Playback |
| MIC | Microphone pickup hole |
| RES | Reset button (use a thin object to press) |
| AUX | Audio input (3.5mm jack) |
| Type-C | Type-C charging interface |
| -10/+10 | Jump -10 tracks / +10 tracks |
| 1/2/3/4/5/6 | Radio preset stations 1 to 6 |
5.2. Remote Control Functions
The unit comes with a remote control for convenient operation. The layout may vary slightly between remote versions, but core functions are similar. Below are common functions found on the remote control (refer to Remote Control 3 for typical layout):
| Button | Function |
|---|---|
| MUTE | Mute On/Off |
| MODE | Switch Mode (Radio, USB, TF, AUX, Bluetooth) |
| ⏻ | Power On/Off |
| VOL+ / VOL- | Volume Up / Volume Down |
| ENT / ⏯ | Enter / Play / Pause |
| ⏮ / ⏭ | Previous Track / Next Track |
| ✆ (crossed) | End Call |
| 0-9 | Number Buttons (for direct track selection or radio frequency input) |
| MENU | Access Menu |
| ✆ | Answer Call |
5.3. Bluetooth Operation
- Turn on the unit and ensure Bluetooth is enabled on your mobile phone.
- On your phone, search for Bluetooth devices and select the unit's Bluetooth name (usually