Function via Bluetooth-enabled devices;No functional restrictions of car radio Allows you to connect an external audio source;It is possible from your smartphone to stream your car stereo Pair your phone with our bluetooth module, and choose Aux from your radio. Easy installation, plug and play. Simple via Bluetooth without complicated code connections Name: MMI Bluetooth Adapter Aux Cable for Q5 A5 A7 R7 S5 A6L A8L A4L Cable length: .17cm Compatibility: for Q5 A5 A7 R7 S5 A6L A8L A4L for / for vehicles, which has 3G system. Installation: 1. Black power cable connected to 3G system. 2. plug into the CD player Jack (please confirm appropriate socket), mobile phone is connected to the Bluetooth module, aux audio source selection, you can play mobile music. Hints: We do not confirm to be compatible above car model years. Please make sure that plug can fit for your car before you order it. You need to adjust the stereo to fit this kit to your car. Colour:black Material:Plastic Size:17cm Package Contents: 1*bluetooth Module Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.