Nady 401X Quad 3 Handheld Channels and 1 Headset Channel Set A Four independent VHF receivers in one convenient, rugged, all-metal single rack space housing&mdash; 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 4-Channels-Mixed AF Out 1/4&quot; phone jack