Type: 3G Bluetooth 5.0, 4-speed function via Bluetooth-enabled devices No functional limitations of the car radio Allows connection of an external o source Connect your smartphone to your car stereo by pairing your phone with the Bluetooth module and using Aux from your radio Easy installation, plug and play Simple Bluetooth setup without complicated code connections Specification: Type: Material: ABS Color: Black Compatibility: For A3, A4 B8, B6, A6 B7, C5, C7, Q5, A5, A7, R8, S5, A6L, A8L, A4L Installation: 1. Connect the black power cable to the 3G system Ensure your Aux is enabled (switch "media" and switch "aux") 2. Plug into the CD player (confirm corresponding socket) Connect mobile phone to the Bluetooth module and Aux o source to play music from your phone Package includes: 1 x Bluetooth adapter 4 x Installation tools Note: Confirm your car has a Music Interface, typically located in the armrest box or storage box; without this interface, the product cannot be used We do not guarantee 100% compatibility with all listed car model years Ensure the connector fits your car before ordering You will need to remove the stereo to install this kit Only the items listed are included; other products are not included Note: Lighting and display differences may cause slight color variations between the image and the actual item Measurement error allowance: +/- 1-3 cm