GROM Audio BMWSSB1 for Select BMW Bluetooth Car Adapter Kit - behind the radio Add wireless Audio to the original factory stereo of many cars. The system comes with built-in Bluetooth. GROM-SB1 module has USB port for 5V charging while on the go, comes with the USB extension cord. Bluetooth functionality: Use your phone in the car hands free (HFP) for IPHONE ONLY (Microphone for Hands Free Calls sold separately), stream your MP3 music from your phone to the factory stereo via Bluetooth Audio playback (A2DP), control your MP3 music with the car stereo or steering wheel controls via Bluetooth wireless audio control (AVRCP). Bluetooth compatibility: all Bluetooth capable smartphones, including latest Galaxy S series and iPhone 5. USB charging: 5V USB charging for any smartphone. Your stereo should be CD changer capable. The in-dash CD changer will remain working, but external CD changer will be disconnected. ATTENTION: Please see compatible cars in Product Description. For help with installation please watch