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Multimedia/Gaming USB Headset With Noise-Canceling Microphone PHPMCU10 .Gives Unique 3-D, 360 Sound Experience .Eliminates the Need for A Sound Card .Windows/Mac Compatible .With In-Line Mute/Volume control .Adjustable Headband for Perfect Fit .Adjustable, Bendable and Pivotable Microphone .Plug Type: USB2.0 .Cable Length: 6Ft .Speaker Driver Diameter: 40mm .Headset Sensitivity(S.P.L): 105dB±3dB/mW (at 1KHz) .Microphone Sensitivity: -58dB±2dB .Headset Impedance: 32 Ohms ± 15% .Microphone Impedance: 1.5K Ohms .Frequency Response: 20~20,000Hz .Maximum Power Input: 100mW Note for USB controller: 1. Button "/\" for volume up 2. Button "\/" for volume down 3. Button “MT” for speaker mute 4. Button “MIC.MUTE” for microphone mute