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)