Features •Backlit LCD display showing RF level, AF level, Channel Frequency and mute status. •100 Selectable frequencies on each channel, up to 20 units can be used simultaneously •Built-In Tone Lock Squelch circuit protection from RF interference •Automatic transmitter setup, the channel of the transmitter and receiver can easily synchronize •Dual channel receiver, Both microphones can be used at the same time •Two XLR individual outputs and one 1/4" Mixed output •Individual volume control on each channel •Frequency: UHF 640MHz - 690MHz •Frequency Response: 45Hz~18KHz •Battery Life: 12 Hours ( AA batteries ) •Range: Up to 300 feet ( 80 meters ) •Rack mountable, Fits 19" rack