Detailed Product Description USB HeadphoneSpecifications:Speaker Size: 50mmSensitivity: 105dB±2dB/mW (at 1kHz)Impedance: 32 ohms ± 10%Frequency response: 20Hz~20,000HzRated power: 100mWPower capability: 1,000mWCable length: 2mMicrophone unit: 6 x 5mm / -58dB±2dBPlug type: USB2.0Windows system and Mac OS