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 and play Simple Bluetooth pairing 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 that Aux is enabled (switch to "Media" and switch to "Aux") 2. Plug into the CD player (confirm correct socket), connect mobile phone to the Bluetooth module, use Aux audio source 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 cannot be used We do not guarantee 100% compatibility with all listed car models Ensure the connector fits your car before ordering You will need to remove the stereo to install this kit Content limited to items listed above; other products not included Lighting and display differences may cause slight color variations between image and actual item Measurement error allowed: +/- 1-3 cm