The Audio Technica 2000 Series frequency-agile True Diversity UHF wireless systems deliver professional audio and RF performance unheard of in its class. Straightforward setup, automatic scanning, and other advanced wireless features brings its performance to a standard that provides the audio quality and reliability necessary for the quality sound systems of today. The ATW-R2100a receiver features automatic frequency scanning that eliminates the need for searching for clear channels by automatically selecting 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. Advanced Tone Lock™ adjustable squelch system fights interference.