Description:
3.5mm stereo QD connecting Cord with volume controller and mute key

Volume controller: Speaker volume up and down
Microphone mute key: On and off
Connect headset to computer VoIP calls, Skype calls or other Internet IM systems.

Accessories Options: 
With P-QD or G-QD, widely compatible with almost all call center headsets

Structure Features:
QD (Quick Disconnect) cord perfectly suited for people who use headset regularly. You can hold on calls and move away from desk easily without removing the headset off your head.