1) Mic Type: 6mm x 5mm 2) Impedance: Maximum2.2KΩ 3) Sensitivity: -58dB ± 2dB(0dB=1v/pa) 4) S/N Ratio: More than 60dB 5) Sensitivity Reduction: Within-3dB at 1.5v 6) Mic Frequency Range: 30Hz-16, 000Hz 7) Speaker: Φ 15mm 8) Sensitivity: 103dB S. P. L at 1KHz 9) Plug Type: Φ 3.5mm