Cord Length: 9.8 feet Headphone Frequency Response: 40Hz-18KHz Headphone Input Impedance: 32 ohm Headphone Sensitivity: 109dB S.P.L. at 1KHz Microphone Impedance: ~2K ohm Microphone Frequency Response: 80Hz-15KHz Microphone Sensitivity: -38 dBV/Pa Features: Excellent voice clarity – noise-canceling microphone filters background noise out Enjoy listening to music – speakers providing excellent Sennheiser stereo sound Highly comfortable – lightweight extendable headband for hours of use in the office and at home Adjustable microphone boom – easy correct microphone positioning which keeps the speech clear Easy to use – simply plug'n'play