Headset type: headset Plug diameter: 3.5mm Frequency response range: 30 ~ 16000hz (Hz) Impedance: 16-30 (Ω) Sensitivity: 105dB±3dB (dB) Speaker diameter: Φ40m (Φmm) Distortion rate: 0.1 (%) Earplug/earmuff material: PU leather