Bluetooth Music Adapter for BMW E46 E39 E38 Business Rundpin (1 pcs) (Black) BlueMusic audio adapter for wireless transmission of music, navigation announcements, YouTube, etc. Title control via radio or steering wheel. Playback starts automatically when selecting the radio source, stops when switching to another source. Telephony is not supported through this adapter (use a separate hands-free adapter with microphone for calls). Developed in Germany. Integrated amplifier for optimal audio quality. Supports up to Bluetooth 5.0 for low power consumption. Integrated antenna ensures stable connection throughout the vehicle. Installation: Minimal effort required. Adapter connects invisibly to the back of the radio. Compatible with stem units equipped with 4:3 onboard monitor located in trunk near radio module. No additional wiring needed for power supply. Radio automatically recognizes the device as a CD changer; no coding required. Product specifications: 3 cm Color: Black Package includes: 1 x Music Adapter