pangshi BOYA BY-WM5 Wireless Lavalier Microphone System Compatible with Samsung HuaWei Smart phone,Lapel Lav Video Mic Compatible with Canon Nikon Sony DSLR Camera Camcorder(BY-WM5) The BOYA BY-WM5 with 2.4 GHz system provide strong anti-interference, the operation range is 50m(164ft). The microphone included a transmitter, receiver, two piece of earphone(one is with speaker), and audio signal cable, a lavalier/lapel microphone. With standard 3.5mm jack compatible with most dslr cameras, camcorders, DV camera, or other camera with 3.5mm jack. The receiver with standard hot shoe mount and 1/4 threaded hole to mounting on all cameras and camcorders, audio recorder, etc. Transmitter and receiver are each requested two AAA batteries(not included).