Microsoft Wired Desktop 400 for Business Quiet touch keys. Combines Sleek Design with Exceptional Value. This desktop set combines a spill-resistant keyboard and optical mouse to deliver all the features you need - and more - with Microsoft quality and reliability. Enjoy plug-and-play setup, Windows Vista® features, Quiet Touch keys, and a comfortable ambidextrous mouse.
Optical mouse and Windows Vista features.
Other special featuresQuiet Touch Keys - Quiet, responsive, thin-profile keys.
Spill-Resistant Design - Integrated water channels drain liquid away.
Plug-and-Play - No software needed. Just connect the keyboard and mouse to your PC and go!

Great for Windows Vista Windows® Start Button - Simply press to launch your Start menu. If you have Windows Vista installed, search your PC or the Web right from there.

Comfort for Either HandMicrosoft Optical Technology - High performance tracking.
Scroll Wheel - Fast on-screen navigation.

System Requirements - Windows Vista®, Windows XP