With your Logitech® Performance Mouse MX™, you’ve got the power to conquer almost any surface and any task without a second thought. 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. Learn more. - 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. - Sculpted, right-handed shape: Designed to fit your hand and put it in a comfortable, natural position. - 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. - Flexible recharging system: Recharge your mouse using a flexible micro-USB system through your computer or a standard wall outlet—even while you’re using it. You’ll always have the power you need to get the job done. - Four thumb buttons: Do more with your mouse using the four customizable thumb buttons. Jump between open windows and applications, move backward or forward through Web pages, and zoom in and out of pictures. * 4 mm minimum thickness