The Azden 310LH is a powerful yet affordable UHF wireless combo-microphone system for camera-mount applications. The system consists of Azden's 35BT body-pack transmitter, EX-503L lavalier microphone, 35HT handheld microphone transmitter and 310UDR camera-mount diversity receiver. The inclusion of both the body-pack and handheld transmitters allows users the flexibility of choosing the right microphone for the right job. With a feature set that includes 188 user selectable UHF frequencies, pivoting high-gain diversity antennas, and LCD digital display, the 310LH 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 transmitters and receiver operate on standard AA alkaline batteries (not included).