Product information:

Headphone type: headset
Wearing method: head-mounted
Headphone output source: HiFi
Plug diameter: 3.5mm
Plug type: in-line type
Whether wireless headset: wired headset
With or without microphone: No
Frequency response range: 16-20000 (Hz)
Impedance: 32 (Ω)
Sensitivity: 100 (dB)
Wire length: 1.2 (m)

Package:
1 * OKCSC M2 wood helmet
1 * 5N OCC 3.5mm silver-plated headphone cable