Details Electret Microphone Ultra-comfortable Also available in single-ear headset (see CC-15) Item Code CC-30-MD4 with mini DIN connector CC-30-X4 with XLR connector Technical Specifications Specifications Double Ear Headset Enclosed Ear Phone Leatherette Ear Pads Electret Microphone Microphone Unit Impedance: 2.2k Ohm +30% Sensitivity: -51dB, +3dB (0dB - 1V/Pa, 1kHz) Speaker Unit Impedance: 40 Ohms +15% (1kHz) Max Power: 100mW (2.0V RMS) Frequency Range: 20Hz - 20kHz (-15dB/1kHz) Output SPL: 106dB = +2.0dB Input: 1mW (0.2V RMS) Weight: 8.5oz (240g) without cable, 10.6oz (300g) with cable