100-channel select UHF wireless system. Unsurpassed state-of-the-art PLL UHF performance with 120dB dynamic range and operation, up to 500ft (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 1/4-inch jack audio line level outputs, squelch (RF mute) adjust, DC input jack, volume control for ease of operation. Externally powered with included DC adapter (15Vdc/400mA). Rugged all-metal receiver designed for long-term durability. Single/dual rack mountable with optional rack kit. UH-1K or UB-1K transmitters. LCD display indicates power/battery level status and group/channel selected. Convenient, economical operation with two AA Alkaline or NiMH batteries. Off/on/mute power switch allows convenient audio muting with the transmitter on.