Nady 351 Video Wireless Handheld System with 351VR Receiver, Uni Dynamic WHT 15 Handheld Mic and Audio Cable, VHF A: 171.905 MHz Ultra-compact receiver can be camera mounted or worn on the body (with attached clip) Easy hook-up to camcorder with supplied connecting cable Powered by a 9V alkaline battery in a convenient slide open battery compartment LED lights indicate low battery and receiver signal Detachable softwire antenna extends from top of the receiver (detachable Rubber Ducky antenna optional)