Type: 3G Bluetooth 5.0, 4-speed function via Bluetooth-enabled devices No functional limitations of the car radio Allows connection of an external audio source from your smartphone to your car stereo Pair your phone with the Bluetooth module and use Aux input on your radio Easy installation, Plug & Play Connect via Bluetooth without complicated code or wiring Specification: Type: Material: ABS Color: Black Compatibility: For A3, A4 B8, B6, A6 B7, C5, C7, Q5, A5, A7, R7, S5, A6L, A8L, A4L Installation: 1. Connect the black power cable to the 3G system Ensure your Aux is enabled (switch to "media" and switch to "aux") 2. Plug into the CD player (confirm corresponding socket) Connect mobile phone to the Bluetooth module and set audio source to Aux to play music from your phone Package includes: 1 x Bluetooth module 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 will not work. We cannot guarantee 100% compatibility with all listed car models. Ensure the connector fits your car before installation. You may need to remove the stereo to install this kit. Only the items listed are included; other products are not included. Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance: +/- 1-3 cm