The Micmute PPD from Whirlwind is a compact desktop-style on/off switch that provides quick and easy control of a mic or line audio signal. The rugged metal housing offers XLR input and output connectors for wide compatibility. The indicating rocker switch will toggle between on and off states, blocking and passing audio alternately with each switch. In the "on" state, the switch shows a red bar. A blue LED illuminates when a mic is live and a signal is passing through the box, and is not functional when phantom power is not present. The Micmute is entirely passive, requiring no power.