Boundary microphone is condenser, cardioid. It has 30 to 20kHz, on/off switch, 10.5oz, 4.1" x 4" x .83", integral 3 - pin XLR(M), Zinc die-cast, filter switch. It can be mounted to wall or table.
Low profile
PTT/PTL multi-mode switching allows Push to Talk, Push to Mute or Latching ON/OFF operation