About Product:2017.11: time to market supply of goods categories: spot type: type of headsets, headphones wearing way: headset output audio source: portable audio plug diameter: 3.5 mm plug type: type into whether wireless headset: wired headset with and without the microphone: there are voices: moving coil frequency response range: 20-20000 (Hz) impedance: 32 (Ω) sensitivity: 105 + 3 (dB) distortion rate: 2 (%) wire length: 1.2 (m) trumpet diameter: 40 (Φ mm) ears