SpeakerDriver Unit 50 MMSpeaker Impedance:32Frequency Response:20HZ-20001HZDistortion Rate1KHz < 3%USB 2.0 Gold platedMicSensitivity:-38+-3dBFrequency Range:100Hz-10000HzDistortion Rate1KHz < 3%Signal to noise ratio: 58 dBImpedance: 2.2KSystem RequirementsPc or Mac with a free USB portWindows10/Windows8/Windows7Mac OS X(10.8-10.10)Internet connection100MB of Free hard disk space