The 330UPR is a high quality dual-channel UHF camera-mount wireless receiver that features 188 user-selectable frequencies to assure you of always finding a “free” channel. It Includes pivoting high-gain antennas and an LCD digital display. The 330UPR can work with any two 300 Series transmitters simultaneously. Comes with a 3.5mm stereo output cable. The MX-2 Mini to XLR Stereo Y Cable can be purchased separately.