SpecificationsMfr Part Number: SP-IMME282Features:USB stereo headphoneVolume controlDurable textile cable lineEar cups with cushion for greater comfortFlexible headband for easy adjustmentCompatible with Microsoft Windows 2000/ XP/ Vista/ Win7 /Windows 8, Mac OS X, Red Hat, Fedora, etc.Speakers:Diameter: 40 mmFrequency: 20 ~ 20 KHzImpedance: 32 ohm ±15%Sensitivity: 110dB ±3dBMicrophone:Diameter: 6.5 mmSensitivity: -58dB ±2dBImpedance: 2.2Kohm ±15%Cord with function control buttonColor: BlackCable Length: 2.0 m