Type Output Impedance : Dynamic Microphone 500 Ω ± 30% at 1  KHz , Sensitivity : -74 dB ± 3dB (0dB = 1 V/ bar at 1 KHz), Frequensy response : 100 Hz  ~ 100 KHz see response curve 15g, Weight : ᴓ30 x 29 mm, Dimensional : 180 (average), Directivity : More than -15 dB (at 200 Hz to 2000 Hz).