KOSS CS100K Supra-aural Communication Stereophone

KOSS CS100K Supra-aural Communication Stereophone Cord Length: 8 ft. Headphone Frequency Response: 30Hz-16KHz Headphone THD: Headphone Input Impedance: 32 ohm Headphone Sensitivity: 91dB S.P.L. at 1KHz Weight: 0.4 Microphone Frequency Response: 100Hz-16KHz Microphone Sensitivity: -56dB +/- 3dB per 1V/1KHz; (-36dB +/- 3dB, V/Pa)