Installation instructions: 1.Open AMI system and switch to "Media " 2.Switch the source to Aux mode (external audio input) 3.Connect this cable to AMI port and press round button of the adapter to switch between USB mode and Bluetooth 4. Connect the bluetooth adapter by your cell phone device Purchase Notes: 1.This adapter needs USB power sport to work, package does not offer a car charger 2.USB lead wire have 3ft long, it will long enough to reach the cigarette lighter port and it is very thin, so you can easy to hideand it between closed glove box doors. 3.Please confirm your car have the AMI/ MMI/ MID port and check below of Compatible listing before purchasing Specification: Bluetooth Version: Bluetooth 4.1 Working Range:10M SNR(signal-to-noise ratio): >75DB Distortion: A Set Bluetooth Adapter compatible with Audi VW Sokda