USB adaptor cord 
Plug and Play technology, with individual sound card, apply to any software including windows98/2000/XP/7
Compatible with all USB-capable computers
For IP, VoIP or Skype phones and other PC-based voice solution
With volume controller: Speaker Volume Up and Down, Mic volume On and Off
Nice design of LED indicator for microphone mute
With P-QD or G-QD, widely compatible with most call center headsets

ACCESSORIES OPTIONS

Standard USB 2.0 Plug 

  USB Volume Controller and working LED Indicator

With P-QD or G-QD, widely compatible with most call center headsets

            P-QD                                                                  G-QD