Feature: Function via Bluetooth-enabled devices No functional limitations of the car radio.Allows you to connect an external audio source It is possible from your smartphone to your car stereo to stream Pair your phone with our bluetooth module, and choose Aux from your radio. Easy installation, Plug & Play.Easy via Bluetooth without complicated code connections. Installation: 1. Black power cable connected to 3G system . 2. Plug into the CD player Jack (please confirm corresponding socket), mobile phone is connected with the Bluetooth module, aux audio source selection, you can play mobile phone music. Fitment: For Q5 A5 A7 R7 S5 A6L A8L A4L For /for for vehicles which has 3G system. Material: plastic colour: Black Package Contents: 1 x Bluetooth Audio Cable 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.