The Boya BY-WM5 wireless microphone is compact, high performance, lightweight, and compatible with DSLR cameras, camcorders, audio recorder etc. It features experience more freedom of movement while recording, excellent sound quality, great portability, easy setup, two way communication system, and approximate 50m (164 ft.) operation range. It consists of a transmitter, receiver, two piece of earphone (one is with speaker), an audio signal cable, a lavalier/lapel microphone.