Nady 401X Quad GT Guitar System Instrument Bodypack Designed for all professional applications, the 401X Quad offer unsurpassed RF and audio, enhanced full-featured operation and rackmount convenience. The 401X Quad system deliver high-end performance at amazingly cost effective prices. Four independent VHF receivers in one convenient, rugged, all-metal single rack space housing — makes operating 4 wireless systems at the same time easier than ever 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 — unmatched transparent audio with 120 dB dynamic range and up to 250+ feet optimum line-of-sight operation Choice of WLT, WGT, WHT, or Link 2™ transmitter: any 4 can be operated simultaneously on the 4 different channels