Nady U-800 UHF 800-Channel Wireless Handheld Microphone System w/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 Nady DM-10D unidirectional neodymium dynamic cartridge for optimum true sound, maximum feedback rejection, and minimal handling noise