Works wherever you do, even on glass Track virtually anywhere—even on a glass desk—with Logitech Darkfield Laser Tracking.Turn the world into your mouse pad. Small wonder Logitech Unifying receiver—the tiny, wireless receiver that stays in your notebook and lets you add devices as you need them. Plug it. Forget it. Add to it. Learn more about the Logitech Unifying receiver. Conforms to you The compact, ergonomically designed shape and integrated thumb buttons deliver comfort and control wherever you are. Hyper-fast scrolling You’ll fly through documents and Web pages with a single spin. Click-to-click scrolling gives you the precision you need when navigating lists, slides, and images.Excited about hyper-fast scrolling? Compact, ergonomically designed The compact, ergomomic design helps keep you comfortable wherever you want to use your laptop—at home, at work, or on the go.Comfortable hands like comfortable mice.