Product Description
From the Manufacturer

Overview:

Microsoft® Notebook Optical Mouse - Comfort and Style on the Go
Navigate in greater comfort wherever you need to work. Optical accuracy and the convenient scroll wheel ensure smooth performance.
Features:

* Comfort, mobility and style - Sized for mobility and designed to be noticed, Notebook Optical Mouse offers unprecedented comfort for either hand. So comfortable, you‘ll want to take it everywhere.
* Unique clear scroll wheel - The unique, wider scroll wheel lets you move through documents and Web sites quickly without clicking on the scroll bar.
* Microsoft Optical Technology-No mouse ball - Notebook Optical Mouse features Microsoft Optical Technology. It scans virtually any surface*-even your pant leg-for precision performance in even the tightest spaces.

*The optical sensor performs best on surfaces with detail to track. It will not function on surfaces without visible detail (e.g., glass) or surfaces where it will see its reflection (e.g., mirrors).