Specification:1.Speaker diameter :φ20 2.Impedance: 32Ω 3.Sensitivity: 108dB±3dB at 1KHZ 4.Frequency Response: 20-20,000HZ 5.Rated Power: 10mW 6.Microphone: φ6×5 7.Sensitivity:-58dB±3dB 8.Cable length: 2m 9.Plug: φ3.5mm×2 10.Applicationscomputer,network telephone,chat by internet,skype, and so on .