Passive 4x1 selector, use to compare 4 mics in the studio, XLR i/o
Phantom Power supply and footswitch toggles condensor mic between two outputs
Latching footswitch toggles two XLR inputs to one XLR output
Momentary footswitch toggles dynamic mic from PA to intercom
Balanced AB wireless signal router, may be remotely controlled
Microphone effects loop & switcher for guitar effects pedals