EP3 Headphones M2T Stereo Transmitter M2R Stereo Receiver High-fidelity sound Can hear yourself better at lower volumes Band M operates on frequencies between 614.000 to 647.000Mhz Band L operates on frequencies between 575.000 to 608.000Mhz 100 selectable UHF channels Up to 10 simultaneous systems per frequency band 3.5mm line-in jack connects to ambient microphone, click track, and more LED indicators provide easy-to-read level monitoring XLR loop output (true pass-through) connects to signal