Usage Tips:Type: 3GBluetooth 5.0, 4 times speedFunction via Bluetooth-enabled devicesNo functional limitations of the car radioAllows you to connect an external audio sourceIt is possible from your smartphone to your car stereo to streamPair your phone with our bluetooth module, and choose Aux from your radio.Easy installation, Plug & Play.Easy via Bluetooth without complicated code connections.Specification:Type:Material: ABSColour: BlackCompatibility:For A3 A4 B8 B6 A6 C6 B7 C6 C5 C7 Q5 A5 A7 R7 S5 Q7 A6L A8L A4LInstallation:1. Black cable connected to 3G system .Make that is your aux in enabled in green (swich "media" and swich"aux")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.Package includes :1 x Bluetooth4 x Install toolNote:Please confirm that your car with a AMI- Music Interface, it is generally in the armrest box or storage box, without this Interface will not be able to use this product.We don't confirm to compatible above car model years .please make that connector can fit for your car Before you order it.You will need to remove the stereo to fit this kit to your car.Only the above package content, other products are not included.Note: Light 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.