2016 New eranton NFC-enabled Bluetooth 4.0 Aux Adapter for Car Stereo Hands Free Car Kit Wireless Music Receiver with Magnetic Base The latest Bluetooth 4.0 chip (backward compatible) for full-speed transmission and low power consumption,Support NFC fast pairing tech With built-in mic,you can answer/receive calls with any bluetooth smartphones clearly Stream high quality music from your A2DP bluetooth devices to car stereo system via 3.5mm AUX cable,Support AVRCP technology for music controls, Music player controls - Play, Pause, Previous song, Next song; Answer and reject calls Multipoint- Connection function is also supported so you can pair 2 phones simultaneously with this bluetooth receiver Easy to use,just plug the 3.5mm cable to the AUX port of your car sound system then plug the usb to a charger port for power supply,Power on/off with engine ignition,no battery is needed