Backlit LCD display showing RF level, AF level, Channel Frequency and transmitter battery level. •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 frequency scanning to find and set the best available channel •Automatic transmitter setup, the channel of the transmitter and receiver can easily synchronize •two 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 330 feet ( 250 meters )