Dual Cordless Microphone System SKM9000 Handheld Mic Set for Stage Vocal Karaoke Features Backlit LCD display showing RF level, AF level, Channel Frequency and mute status, battery level display. 100 Selectable frequencies on each channel, up to 20 units can be used simultaneously Built-In Tone Lock Squelch circuit protection from RF interference Manual frequency selectable and set the best available channel 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 510MHz - 570MHz Frequency Response: 45Hz~18KHz Battery Life: 10 Hours ( AA batteries ) Range: Up to 490 feet ( 150 meters ) Rack mountable, Fits 19" rack Package includes: (1) Dual channel UHF receiver (2) 2 metal handheld microphones (3) 1/4" audio cable (4) AC-DC adapter (5) Manual