Front dual antenna jacks for either onboard or remote antennas Front panel on/off switch plus Power On LED TX On & AF signal level LED displays Rear panel individual XLR outputs volume & RF mute controls for each of the 4 channels & 4-channels-mixed AF 1/4" output Noise-free transmitter on/off operation High performance--unmatched transparent audio with 120dB dynamic range & up to 25ft optimum line-of-sight operation Includes 4 WLT bodypack transmitters & 4 HM-3 head-worn microphones 4 transmitters (any combination) can be operated simultaneously on the 4 different channels (A/B/D/N)