Audio-Technica ATW-3110a UHF Unipak Wireless System Band D Automatic frequency scanning 200 PLL-synthesized channels per band selectable via soft-touch controls on receiver and transmitter Available in two frequency bands: 541.500 - 566.375 MHz (TV Channels 25 - 30) 655.500 - 680.375 MHz (TV Channels 44 - 49) True Diversity operation selects the better signal from two independent receiver sections, reducing dropouts Interference-resistant UHF band operation Advanced digital Tone Lock squelch Red alert light that w 200-channel frequency selectable UHF bodypack system Soft-touch controls on receiver and transmitter True Diversity operation selects the better signal from two independent receiver sections, reducing dropouts Interference-resistant UHF band operation Advanced digital ToneLock squelch