TOA PM-660U Desktop Paging Microphone, Unidirectional Polar Pattern, 600 Ohm Balanced Rated Impedance, -58 dB Rated Sensitivity, 100Hz - 10kHz Frequency Response

Large talk switch and a lock lever for easy and convenient operation Robust anti-vibration construction and balanced output Equipped with a remote control switch Power on/off operation or chime activation Dimensions (WxHxD): 100 x 215 x 150 mm (3.94" x 8.46" x 5.91")