SteelSeries Siberia Neckband Gaming Headset (White) Headphone - Frequency response: 18 - 28.000 Hz - Impedance: 40 Ohm - SPL@1kHz, 1V rms: 104 dB Microphone - Frequency response: 80 - 15.000 Hz - Impedance: 2K Ohm Pick-up pattern: Uni-directional - Sensitivity (1V/P@1 kHz): -38 dB