Digital wireless handheld set. Includes (1 ) EW-D EM digital 19 1/2" single channel receiver , (1) EW-D SKM digital handheld transmitter with mute switch, (1) MMD 835 microphone module, (1) MZQ1 microphone clip, (1) NT 12-5 CW+ power supply with country adapters, (1) rack mount kit and AA batteries, frequency range: (520 - 576 MHz)