ONE NEW Workman EMG51 replacement electret condenser microphone element for Cobra condenser microphones such as CA66 and CA67. [NOT COMPATIBLE WITH DYNAMIC MICROPHONES]. This is a small, high-quality and dependable element. 

NOTE: Electret elements require bias power to be applied by the microphone or radio for operation. 

SPECIFICATIONS:
Sensitivity: 64 +/- 3dB
S/N Ratio: 40dB or more
Frequency Response: 50Hz-8KHz
Directivity: Omni-directional
Output Impedance 1Kohm
Working Voltage Range: 2-10V (see spec sheet for 12VDC voltage divider bias circuit)
Max Current Draw: 1mA
Max Input Sound Pressure: 120dB
Dimensions: 3/8in (D) x 3/8in (H)

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