You work everywhere. Now your mouse does, too. When you’re using Logitech® Anywhere Mouse MX™ with Logitech® Darkfield Laser Tracking™, you’ve got the power and precision to triumph over surfaces like glass tables where optical and standard laser mice fail. Performance - Logitech® Darkfield Laser Tracking™: You get accurate, precise cursor control on virtually any surface, even glass tables (4 mm minimum thickness) where optical and standard laser mice fail. - Hyper-fast scrolling: Fly through long documents and Web pages with a single spin. Or use click-to-click scrolling for the precision you need when navigating lists, slides, and images. - Logitech® Advanced 2.4 GHz wireless: You get the reliability of a cord plus cordless convenience and freedom—fast data transmission and virtually no delays or dropouts. Convenience - Logitech® Unifying receiver: The tiny receiver stays in your notebook. There’s no need to unplug it when you move around, so your mouse is always connected when and where you feel like using it. Plus, you can easily add a compatible wireless keyboard or number pad, or even another mouse—without the hassle of multiple USB receivers. - Comfortable even on the go: Small enough to take with you, the sculpted shape fits your fingers for a naturally comfortable grip. - Back and forward thumb buttons: There’s more control within your reach. Move quickly through Web pages. * 4 mm minimum thickness