The 310UDR is a high quality, diversity UHF camera-mount wireless receiver that features 188 user-selectable frequencies displayed on an LCD screen to assure you of always finding a “free” channel. Also included are main and headphone monitor outputs, a removable shoe-mount adapter and a 3.5mm mini-jack output cable. An XLR adapter output cable is available (MX-1). The 310UDR operates on standard AA alkaline batteries (not included). The 310UDR works with all 300 series transmitters, including the 35BT Belt-Pack transmitter, the 35HT Handheld microphone/transmitter and the 35XT Plug-In transmitter.