Upgraded Car Bluetooth Adapter Aux, 35Mm Bluetooth 50 Aux Receiver, Bluetooth Hand-Free Car Kit, Noise Cancelling Wireless Audio Music Adapter For Homecar Stereo Music Streaming Sound Systemi>How to Pairing with Bluetooth Device:i> 1Power on: Press and hold the MFB for 3 seconds to power on, the indicator light flashes red and blue alternately, wh..