Product information:

Wearing method: head-mounted
Headphone output audio source: communication equipment
Plug diameter: crystal head
Plug type: RJ11-crystal head interface
Whether wireless earphone: Wired earphone
Distortion rate: 0.1 (%)
Wire length: 2.5 (m)
Horn diameter: 28 (Φmm)
Earplugs/earmuffs material: PU leather case
Headphone cable material: TPU
Colour: Black

Packing list:
Telephone headset x1