Nady "401X Quad HM-1 Headset Wireless System Band E4, F, H, E" "Front dual antenna jacks for either onboard or remote antennas Front panel Power ON/OFF switch, plus Power ON LED, TX ON, and AF signal level LED displays Noise-free transmitter ON/OFF operation Rear panel individual XLR Output jacks, volume and RF mute controls for each of the 4 channels, and 4-Channels-Mixed AF Out 1/4"" phone jack High performance, transparent audio with 120dB dynamic range and up to 500 feet optimum line-of-sight operation 4 transmitters can be operated si" "Front panel Power ON/OFF switch, plus Power ON LED, TX ON, and AF signal level LED displays" Noise-free transmitter ON/OFF operation "Rear panel individual XLR Output jacks, volume and RF mute controls for each of the 4 channels, and 4-Channels-Mixed AF Out 1/4"" phone jack" "High performance, transparent audio with 12dB dynamic range and up to 5 feet optimum line-of-sight operation"