Serious advances in affordable professional wireless Clear sound quality and rock-solid, dependable performance Automatic frequency scanning 10 compatible user-switchable channels Antenna power available for powered antennas & other in-line RF devices True Diversity operation selects the better signal from the two receiver sections, reducing dropouts Tone Lock™ tone squelch system fights interference Rugged metal half-rack receiver with soft-touch controls and LCD display Balanced XLR and unbalanced 1/4” output jacks enable use with a wide variety of audio gear Switchable transmitter power output with high and low settings offered Includes rack-mount kit and detachable UHF antennas Ground-lift switch helps eliminate audible hum caused by ground loops between the sound system and receiver ATW-T220a Handheld Microphone/Transmitter features PRO 41 Capsule for maximum feedback rejection and consistent sound .