BOYA BY-WM5 Pro Wireless Lavalier Microphone Microphone System for Canon Nikon Sony DSLR Camcorder Audio Recorders It consists of a transmitter, receiver, two piece of earphone( one is with speaker), an audio signal cable, a lavalier/lapel microphone. Experience more freedom of movement while recording . Two way communication system. Approximate 50m(164ft.) operation range. The receiver with standard hotshoe, compatible with DSLR cameras, camcorders, audio recorder etc..