Note: spec taken from Play.com as Dell doesnt seem to have the full spec listed.
* Behind-the-head, USB/analogue headset optimised for notebooks
* Adjustable earpieces for a comfortable, secure fit
* Rotating, adjustable, noise-cancelling microphone
* Folding headset with practical travel case
* Convenient inline volume and mute control located on cable
* Perfect for PC calling, Internet chat, gaming, movies and music
* USB and analogue connectivity for PC, Mac and many MP3 players
* Adjustable earpieces: For a comfortable, individual fit. The rotating microphone also adjusts, for optimum voice clarity
* Travel case: The headset folds flat into the included case, for protection on the way to the office or around the world
* Convenient in-line controls: Provides quick access to volume and mute functions
* Frequency response: Headset: 20-20,000 Hz
* Microphone: 100-10,000 Hz
* Sensitivity: -62 dBV/µBar, -42 dBV/Pa+/-3dB
* Cable length: 1.8 m.