Sanwa Supply 4-pole headset

I am selling the new one because I have two of the same item.
I opened it and immediately closed it, so the contents are as good as new.
I use the same one, and the sound quality is very good.

Specifications
Headphones
Type: Dynamic (stereo)
Speaker unit diameter: 30mm
Frequency response: 20-20000Hz
Impedance: 32Ω
Volume adjustment: Yes (handheld switch)
Maximum input: 100mW
Wearing type: Over-head type
Stereo compatible: Yes
Size: Small
Earpad material: Sponge
Microphone
Type: Condenser type
Directivity: Uni-directional
Frequency response: 100-10000Hz
Impedance: 2.2KΩ
Input sensitivity: -30±3dB (0dB=1V/Pa, 1kHz)
-50±3dB (0dB=1V/ubar, 1kHz)
Microphone mute function: Yes (handheld switch)
Windscreen (sponge): Yes
Common specifications
Cable length: 1.8m
Plug shape: 3.5mm 4-pole mini plug (CTIA standard compliant) Gold-plated
Weight: Approximately 76g (including cable)
Set contents: Headset body, instruction manual, warranty card
Features
Lightweight and comfortable to wear, ideal for long hours of use.
Adopts a uni-directional microphone that is less likely to pick up ambient noise.
Comes with a controller that allows you to mute the microphone and adjust the volume.
The earpads use breathable sponge material that prevents stuffiness.
The flexible arm allows for fine adjustment of the microphone position.
Includes a windscreen to reduce breath noise.

4-pole compatible
Working from home
Remote work
Telework
Headset
Headphones
Earphones
Remote work
Classes
Meetings
Learning