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Logitech MX-620 Cordless Laser Mouse - 910-000272  

Scroll through 10,000 lines in just 7 seconds-and stop on a dime.

Control
Revolutionary hyper-fast scroll wheel: Fly through long documents at hyperspeed with the nearly frictionless alloy scroll wheel. Shift to precise, click-to-click scrolling for navigating lists, slides, and image collections.
Laser precision: Experience pixel-perfect precision and smoother cursor control on virtually all surfaces.*
 
Convenience
Cordless Freedom^TM: Enjoy uninterrupted connection with Logitech® 2.4 GHz Digital Cordless, even in the busiest wireless environments.
Extended battery life: Go up to a year without replacing batteries-longer if you use the on/off button. A battery power indicator eliminates surprises.
Advanced search and navigation: Highlight a word or phrase and press the search button to display results from your favorite search engine instantly. Universal forward/back buttons speed up Web browsing and paging through large documents.

MicroGear^TM Precision Scroll Wheel

A new concept in PC navigation, this revolutionary alloy scroll wheel operates in two distinct modes: Free-spin Mode for hyper-fast, nearly frictionless scrolling, or Click-to-click Mode for detailed navigation using an ultra-precise ratchet-scrolling mechanism. Fly through hundreds of pages - or move line-by-line - with more precision than ever before