Nady U-800 UHF 800-Channel Wireless Instrument / Guitar System with True Diversity A full set of professional features. Unsurpassed state-of-the-art PLL UHF performance with operation up to 500 feet line-of sight 800 user-selectable UHF frequencies w/ one-touch Autoscan open-channel automatic selection Proprietary companding and low-noise circuitry for an amazing 120dB dynamic range along with DigiTRU Diversity for maximum range and dropout protection. Half-rack receiver design with folding front panel dual antennas Durable, all metal UB-3 bodypack transmitter w/ locking 3.5mm jack ensures secure connection and dependable operation