Buy.com has a Microsoft Notebook Optical Mouse 4000- Dark Gray for $28.49 with Free Shipping.
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- Microsoft High Definition Optical mouse products are more precise, more responsive, and deliver smoother tracking n
- Point and click to enlarge and edit details using the Magnifier n
- Scroll four ways for greater efficiency and comfort with 4-Way Scrolling n
- Plug in the snap-in receiver when you’re ready to work, then snap it into your mouse when you travel, preserving battery life n
- Work with less interruption with longer battery life