In-ear mobile phone headset $ 68.33 Headphone output audio source: HiFi Plug diameter: 3.5mm Plug type: straight plug type Wireless headset: both Sounding principle: moving iron Frequency response range: 20-40000 (Hz) Impedance: 20 () Sensitivity: 101 (dB) Distortion rate: 1 (%) Wire length: 1.2 (m) Speaker diameter: 4 (mm) Earplugs/earmuffs material: skin-friendly silicone sleeve Headphone cable material: TPE