The Nady UWS-100 HM3 Headset Wireless System includes a UWS-100 receiver, a WLT bodypack transmitter, and a uni-directional condenser HM-3 Headmic. The Nady UWS-100 receiver is a 100-channel, select UHF Wireless System with 100 frequencies per 24MHz wide band, that are manually selectable or by autoscan feature for open channels. The UWS-100 offers unsurpassed state-of-the-art PLL UHF performance with 120dB dynamic range and operation up to 500" line-of-sight. Other UWS-100 features include: ASC (Auto-Sync Channels) download which sends selected Group/Channel information to the transmitter using the IR sender for easy frequency synchronization; Tone Squelch circuitry for protection from RF interference; Front Panel Touch control buttons for ease-of-channel selection; ASC operation; and DigiTRU Diversity for maximum range and dropout protection. The Nady WLT bodypack transmitter works perfectly with the UWS-100 and is designed for use with lapel microphones or the included HM3 Headmic.Nady UWS-100 Unsurpassed state-of-the-art PLL UHF performance with 120dB dynamic range and operation, up to 500 ft. (line-of-sight) 100 user-switchable UHF frequencies per band, or automatic open channel selection with convenient auto-scan feature ASC (Auto-Sync Channels) download feature sends selected Group/Channel information to transmitter via IR sender for easy frequency synchronization Front panel touch control buttons for ease of channel selection and ASC operation Tone Squelch circuitry for protection from RF interference DigiTRU Diversity for maximum range and dropout protection AF level displays and folding dual antennas Front panel On/Off button (with Power On LED indicator); full LED indicators including A/B diversity, Group/Channel selected, ASC transfer status, and bi color (green/red) Back panel balanced XLR fixed Mic Level and adjustable unbalanced ¼" jack audio Line Level outputs; squelch (RF mute) adjust; DC input jack; volume control for ease of operation Externally powered with included DC adapter (15 VDC 400 mA) Rugged all-metal receiver designed for long-term durability. WLT Bodypack Transmitters: Off/Standby/On switch allows convenient audio muting with the transmitter on Input level adjust Locking 3.5mm jack LED status indicator flashes once for unit on, lights steady for low-battery alert HM-3 Condenser Headmic Lightweight and designed for long comfortable wear Omnidirectional condenser element provides exceptional audio with excellent transparency and gain before feedback Comes with Mini-XLR or 3.5mm phone plug for your wireless bodypack transmitter Requires low voltage phantom power as supplied by most wireless bodypack transmitters