The belt clip on the receiver serves as a camera shoe mount for easy attachment. Two output cables are included: TRS for cameras and TRRS for smartphones or tablets. The clip-on transmitter features a well-sounding built-in microphone and is small and light enough to attach to shirts and clothing. Alternatively, you can use the included professional lavalier microphone SR-M1. No technical knowledge about audio is required for use. The Blink500 operates in the interference-free 2.4 GHz spectrum and automatically switches to free channels to avoid noise and audio dropouts. One transmitter is included, but you can add a second transmitter (sold separately) to mic two people while using the included dual receiver on your camera.