2-YEAR Saramonic Warranty. It comes with 1 transmitter, but you can add a second transmitter (sold separately) to put mics on 2 people while using the included dual-receiver on your camera. No technical knowledge of audio is required to use. The Blink500 operates on the interference-free 2.4GHz spectrum and automatically hops to free channels to avoid static noise and audio dropouts. The belt clip on the receiver acts 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 has a great sounding built-in mic and it’s small and light enough to clip to shirts and clothing, or you can use the included SR-M1 professional lavalier microphone. The Saramonic Blink500 B1(TX+RX)is an incredibly compact, lightweight, and easy-to-use wireless microphone system for DSLR, mirrorless and video cameras, or mobile devices that delivers detailed, broadcast-quality sound.