1Applicable Models: The Bluetooth adapter is a replacement for E85 E86 Z4 2.0, 2.5, 3.0 Coupe and Convertible models 2003?2008. 2High Performance: Adopts high end Bluetooth main control chip and audio digital processing chip, ensure stable audio signal transmission, and high definition sound quality. 3Bluetooth Adapter: Allow you to easily have popular configuration of advanced car stereo, is the best choice for safe driving and enjoying digital music. 4Excellent Sound Quality: Easily streaming music of Bluetooth devices into factory car stereo system, no interference and no loss of sound quality, rivaling original Cd sound. 5Easy Installation: Plug and play, installed via original Cd changer port, easy and fast, perfectly integrated with the car.