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.

Standard USB 2.0 Plug.

USB Volume Controller and working LED Indicator.