Bluetooth Music Audio Stereo Adapter Receiver for Car 3.5mm AUX Home Speaker MP3 for Car Music Sound System Hands Free Calling Built-in Mic - Black Powerful bluetooth IC, more stronger compatibility. Simple operation, normal speaker become hands-free Bluetooth speaker magically, portable for vehicle mounted systems. Powered by built-in rechargeable li-ion battery via mini USB port Play music through your car stereo and answer phone call via the built-in Mic 3.5mm male to male audio connector or 3.5mm male to male audio cable to connect the speakers and the receiver Compatible with : iPhone iPad Laptop and PC with bluetooth 2.1 and above, Samsung HTC all other Android 2.1 (and above) devices with Bluetooth