Nady UHF-3 Wireless Headset + Lapel / Lavaliere Microphone System with True Diversity &ndash; 2 Microphone Bundle (HM-3 + LM-14) Use The Microphone Best Suited To Your Application A full set of professional features. Unsurpassed state-of-the-art PLL UHF performance with operation up to 500 feet line-of sight DigiTRU Diversity and proprietary companding provides maximum range, dropout protection, and low-noise circuitry for an amazing 120dB dynamic range 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 This is a single fixed-frequency wireless system. Please consult the manufacturer to confirm compatibility when attempting to use two or more of this system simultaneously or use it with other wireless systems.