The Logitech Anywhere Mouse MX™ works wherever you do. Thanks to Logitech Darkfield Laser Tracking, youll get precise cursor control on virtually any surface, even glass tables (4 mm minimum thickness) where optical and standard laser mice fail. You can take it anywhere thanks to its compact size. The tiny Logitech® Unifying receiver is small enough to leave in your notebook. Anywhere you go, youll get things done more comfortably with its sculpted design. You get hyper-fast scrolling to fly through long documents and Web pages with a single spin of the scroll wheel. Plus thumb buttons let you go back and forth between Web pages with just a click.