Nine mic mute boxes. All work fine. Real handy for eliminating mic bleed. These were used on a Broadway tour. $10 each. Open to reasonable offers. I need these gone.
A couple of them use AC power (wall warts), the others use a battery to illuminate the switch.
The one with the pedal is passive. The pedal actuates a pneumatic switch. But it uses a battery to illuminate the on/off LED. That one is $20.