This is nice electret microphone with a 90-180 degree plug. Impedance is 2.2k, sensitivity -54 +/- 3dB, ferquency range 100 Hz .. 10 kHz.
Related products:M-MIC-1 | small electret microphone (surplus) | |
M-MIC-2 | electret microphone in case with cable and plug (surplus) |