The Nady U-800 Handheld Wireless System Includes the Nady U-800 Receiver and the UH-800 Handheld Microphone Transmitter. The U-800 has the best performance and price value in professional UHF wireless, offering clear-channel, frequency-agile operation on the UHF band for interference-free performance in any application or locale. The U-800 delivers 800 user-selectable, frequency synthesized channels in the US frequency band 470MHz- 490MHz. The Nady U-800 offers built-in Autoscan for quick and convenient open channel selection and set up of one system, or many wireless systems at the same location for simultaneous multichannel operation. The U-800 features proprietary companding and low-noise circuitry for an industry-best 120dB dynamic range, and the clearest, most natural sound available in wireless today. U-800 Receiver Unsurpassed state-of-the-art PLL UHF performance with 120dB dynamic range and long range operation, up to 500 ft. (line-of-sight) 800 user-selectable UHF frequencies, with one-touch Autoscan open-channel automatic selection ASC (Auto-Sync Channels) download feature sends selected channel information to transmitter via IR sender for easy frequency synchronization Sophisticated IF filtering for optimal simultaneous operation of up to 14 systems in the same location To facilitate multiple, simultaneous systems operation setup, the 800 selectable channels are available from 10 optimized factory pre-set groups of up to 14 compatible channels and 5 additional user-select groups, all offering 800 channels each. All groups retain in memory the previously selected channels for that group for easy setup subsequently in the same location. DigiTRU Diversity for maximum range and dropout protection 120dB Dynamic Range the quietest and best sounding UHF wireless available at any price Tone Squelch for locking out potential interference, and special circuitry for noiseless transmitter ON/OFF switching Tone Squelch for locking out potential interference, and special circuitry for noiseless transmitter On/Off switching Dual front-panel permanently attached swivel antennas Front LCD panel displays A/B diversity, Group/Channel with frequency, ASC transfer status, RF/AF level, Mute (squelch) level, and push On/Off power switch Back panel with Balanced XLR fixed Mic Level and adjustable Unbalanced ¼ jacks, audio Line Level outputs with volume control and DC input jack Half-rack receiver design with unique snap-out, side panel locking tabs for single receiver or dual receivers (side-by-side) optional rack mounting Externally powered with included DC adapter (120VAC/22VDC/400 mA) Choice of transmitters: UH-800 handheld Mic or UB-800 bodypacklavalier (LT), Headmic(HM), or instrument (GT) UH-800 Handheld Microphone Transmitter: Sleek metal housing with internal antenna for optimum aesthetics and durable long life Features the Nady DM-10D unidirectional neodymium dynamic cartridge for optimum true sound, maximum feedback rejection and minimal handling noise 800 easily selectable channels via IR Sync download for easy synchronization with receivers selected channel Easy accessible audio level adjustment for optimum sound Power On/Off and Audio Mute switch allows convenient audio muting with the transmitter ON Status LED indicators for unit ON (green) and for low-battery alert ON (red) Convenient, economical operation with two AA alkaline or NiMH batteries