Professional Wireless HeadsetWith Bluetooth 5.0
Stereo Wired USB Headset
Professional LightweightWired Headset

Kyung Jin has been standing strong in this telecommunication headset industries more than 40 years. All of the expertise and experiences could be accomplished not just by ourselves, but achieved with our partners and customers all around the world.

Model Number KJ-420DM
Abridged Description Office headset with noise-cancelling microphone
Expertise makes better user experience and quality communication

Build your hopes on KJ Electron. We present the future of sounds with our user-friendly, high workability and global design products. Share your trust with us and get supported. We help you start great business for your prosperity.


  • • Office headset with noise-cancelling microphone

    • Speaker mute feature on the one side of a headset

  • • Adjustable headband for perfect fit

    • Leatherette ear cushions

  • • Lightweight design for all-day comfort

    • Available in both monaurals and binaurals

  • • Various connection available; Quick Disconnect, RJ, 2.5mm, 3.5mm, etc.


Microphone Sensitivity -52±3dB
Sensitivity Difference 500 Hz to 4000 Hz > 8dB
Microphone Frequency 100-12000Hz
Microphone Type Unidirectional
Impedance Max. 2.2KΩ 1KHz (RL=2.2KΩ)
Maximum Sound Pressure Level 115dB S.P.L
Speaker Impedance 150Ω ± 15 %
Frequency Response 210Hz ~ 20KHz(±10dB)
Sound Pressure Level 129B ± 3dB at 1000Hz
Microphone Boom 270 degrees rotating boom
Acoustic Shock Protection Protects users' ears from a sudden peak noises
Speaker Mute One side of the speakers can be muted for hearing outside
Contact Us

KYUNG JIN ELECTRON CO., LTD / Address : Rm#304-2, Hanshin IT Tower 2-cha, 47 Daigital-ro 9-gil, Geumcheon-Gu, Seoul KoreaTEL : +82-2-2025-6180 / FAX : +82-2-2025-6182 / MAIL : kj@kj-headset.co.kr