Yatour Car Bluetooth Adapter Handsfree Car Kit For BMW 17PIN E46 E39 etc 1.Plug & Play: installed via original CD changer port, easy and fast, perfectly integrated with the car . Hands-free Phone Call (HFP): supports Answer/Hang up etc., via car radio buttons and steering wheel buttons. 2. Wireless A2DP Playback: easily streaming music of Bluetooth devices into factory car stereo system. Bluetooth AVRCP Control: controls Prev/Next Track, Pause/Play, Fast forward/backward via car radio buttons or steering wheel buttons easily and safely. 3. AUX Input: Supports 3.5mm auxiliary input, able to connect any external audio sources 4. Easy Charge: Offers 5V/1A standard USB charging port. 5. Hi-Fi Sound Quality: Connected to car stereo via wire harness, no interference and no loss of sound quality, rivaling original CD sound.BTA allows you to easily have popular configuration of advanced car stereo, is the best choice for safe driving and enjoying digital music.