This is a used SENNHEISER EM 550 G2 TRUE DIVERSITY RECEIVER + SKM 500 G2 HENDHELD TRANSMITTER with MMD 935 capsule + SK 100 G2 BODYPACK TRANSMITTER + antennas. The frequency is 518-554MHz (A). Tested and fully functional, all the buttons on the display work as they should. Good condition. Price $730 shipped to lower 48.