Microsoft LifeChat LX-4000

Packaged for business Selective sound: the single earpiece provides the ability to handle calls and still hear everything around you Inline volume and microphone controls: adjust volume or mute on the fly with handy inline controls. And the call indicator light lets people know you're busy All day comfort: an ergonomically influenced earpiece and a 270-degree adjustable microphone provide all-day comfort Wired USB Plug and Play: no software needed, just connect the keyboard to your PC and go

Highly sensitive, noise cancelling microphone Provides clear, accurate sound Suitable for noisy work environment