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Product information:Wearing method: Wearing ear protection typeHeadphone output audio source: PC computerPlug diameter: USBPlug type: USBWhether wireless earphone: Wired earphoneIs there a microphone: yesSounding principle: moving coilFrequency response range: 50 (Hz)Impedance: 35 (Ω)Sensitivity: 25 (dB)Distortion rate: 35 (%)Wire length: 2 (m)Speaker diameter: 50 (Φmm) Packing list:Headphone x1