Plug and Play This clip-on mic is easy to use, Automatic Pairing, Automatically Connect When Plugged into the Receiver, No Adapter,Addtional APP,Bluetooth Needed. The red light on receiveing flashes;press switch key of mic, the indicator light turns green, then power is turned on; The red indicator light of receiver and the green indicator light of microphone always keeps on, then you can use the microphone to receive sound by opening phone camera, live App or other Apps.