High quality tie-clip condenser microphone.

Specifications

Element : Back Electret Condenser
Polar Pattern : Omni-directional
Frequency Response : 50Hz-16kHz
Sensitivity : -45dB+/-3dB (0dB=1V/Pa at 1kHz)
Output Impedance : 1000Ohm+/-30% (at 1kHz)
Voltage : 1.5V
Body Dimensions : D8x16.5mm