Audio-Technica's 2000 Series is a 10-channel frequency-agile UHF wireless system designed to suit a variety of applications, including MI/live performance, fixed installation, public address, A/V rental houses and places of worship. It offers all the advantages of a high-quality, professional wireless system at an extremely affordable price. Features include two available frequency bands and switchable antenna power. Offering 10 selectable channels in one of two UHF frequency ranges and True Diversity UHF wireless technology, the 2000 Series features automatic frequency scanning. At the touch of a button, this function automatically determines and sets the best available frequency. Any of the 2000 Series' 10 channels may be used together without any frequency coordination problems or group selection issues. The 2000 Series also incorporates Audio-Technica's Tone Lock squelch plus an easy-to-read LCD information display. ATW-R2100b Frequency-agile True Diversity UHF Receiver Features: High sensitivity dual IF receiving design for dropout-free performance Automatic frequency scanning finds open channel High efficiency compander for flawless audio 10 compatible user-switchable channels in one of two UHF frequency ranges Antenna power available for powered antennas & other in-line RF devices Receiver internal function menu with soft-touch controls Straightforward channel selection process Digital Tone Lock squelch Adjustable receiver squelch True Diversity receiver with silent, automatic switching Tuner operation indicator displays tuner with strongest reception Receiver front panel displays for RF and AF signal levels AC or 12-18 V DC operation Rear panel or front panel antenna mount options Balanced and unbalanced outputs Output level control on the rear panel Ground lift switch on balanced output Rugged metal receiver construction Mounts in a single rack space (1 or 2 units) Clear sound quality, rock solid, dependable performance The ATW-R2100b is a True Diversity UHF wireless receiver operating in the UHF bands of 656.125-678.500 or 487.125-506.500 MHz. The automatic frequency scanning eliminates the need for searching for clear channels and automatically selects the most appropriate frequency for the area in which the wireless is operating. A pre-coordinated integral channel plan allows for simultaneous operation of any of the ten channels in a given location. The flexibility in programming both the receiver and transmitters eliminates confusing frequency groups and other frequency coordination problems. A two-position switch turns on/off 12V AC antenna power for use with powered antennas or accessories. Advanced Tone Lock adjustable squelch system fights interference.