Bluetooth Wireless Headset

Whether wireless headset: wireless headset
Is there a microphone: yes
Sounding principle: moving coil
Frequency response range: 20-2000HZ (Hz)
Impedance: 32 (Ω)
Sensitivity: 108±3dB (dB)
Distortion rate: 3 (%)
Wire length: 1.5 (m)
Horn diameter: 40 (Φmm)