The ROLLS MS111 is a general purpose muting switch for microphones. The MS111 will pass phantom power, with no popping on the outputs. It is configurable to be Push to Mute or release to Mute by a second switch accessed on the side of the unit. The MS111 can have the mute switch configured to be Momentary (see manual), the switch is set to latching from the factory. The MS111 is only compatible with balanced signals.