Microsoft Wireless Mobile Mouse 3000, Purple (In-store Only)

Compact and comfortable to use. This ergonomic, wireless mouse can be used comfortably with either hand without getting tangled up in cords. It stores perfectly in any small bag so you can take it wherever you take your laptop.
High-definition optical technology. Enjoy smooth tracking and better responsiveness on nearly any surface.
4 buttons and a scroll wheel make mousing a snap. 4 easy-to-use buttons include AutoScroll, plus a "back" button to help you easily navigate folders or Web pages.
Plug and play via the snap-in receiver. Simply attach the receiver into any available USB port and begin mousing. You can use the receiver to turn the mouse off and extend battery life — the Mobile Mouse offers a battery life of up to 6 months or more.
Compatible with Windows PCs and Macs.
Uses 1 AA battery (included).