Digital wireless handheld base set. Includes (1) EW-D EM digital 19 1/2" single channel receiver, (1) EW-D SKM digital handheld transmitter with mute switch (microphone module sold separately), (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)