Details Electret Microphone Ultra-comfortable Also available in dual-ear headset (see CC-30) Item Code CC-15-MD4 with mini DIN connector CC-15-X4 with XLR connector Technical Specifications Specifications Single 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: 6oz (170g) without cable, 8.1oz (230g) with cable