Microsoft Compact Optical Mouse 500 - Black Value in a Notebook Optical Mouse. This affordable, compact mouse with Microsoft® Optical Technology is an ideal companion for on-the-go notebooks where work space is at a premium. It delivers precise cursor control on a wide variety of surfaces, and is comfortable in either hand.
Optical technology
Microsoft® Optical Technology High performance Optical Technology - no mouse ball. 800 dpi optical sensor delivers greater accuracy and control.
Scroll wheel Move through your documents quickly without having to click on the on-screen scroll bar.
Comfort Get a grip with a comfortable design created for either hand.
Compact Easy to carry along and use on small work spaces.

Easy to Set Up and Use No software to install, no feature setup required.
3-year limited hardware warranty
System Requirements - For a Windows®-based PC: Requires a PC that meets the requirements for and has installed one of these operating systems: Windows Vista®/Windows XP/2000/98 - USB Port