Price:Negotiable

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Features:- A revolutionary new 800 dpi sensor captures 4.7 megapixels every second, measuring even the smallest movement. You get more accuracy and control on more surfaces than ever before.- Quick Switch program selectorAt the touch of a button you can switch views between active programs and documents.- Convenient Internet navigationTwo conveniently located side buttons let you easily move forward and back through pages on the Internet.- High-precision scrollingNever use scroll bars again. Improve your searching speed by using the scroll wheel to quickly move through documents.