The Azden 310LT UHF On-Camera Bodypack System is a powerful yet affordable UHF wireless microphone system for camera-mount applications. The system consists of Azden"s 35BT bodypack transmitter, EX-503 lavalier microphone and 310UDR camera-mount diversity receiver. With a feature set that includes 188 user selectable UHF frequencies, pivoting high-gain diversity antennas and LCD digital display, the 310LT is guaranteed to meet the demands of consumer and professional video applications alike. The 310UDR receiver features main and headphone monitor outputs and a removable shoe-mount adapter. Both the transmitter and receiver operate on standard AA alkaline batteries (not included).