Performance mouse MX wireless. The outer package number allows us to track where the product is shipped. The serial number on the product helps us track production date and validate warranty calls. Logitech Performance Mouse MX The power to achieve more on more surfaces Your hand is poised. You're set to create the big presentation. And with your Logitech Performance Mouse MX, nothing stands in your way. This is the mouse that puts high performance in the palm of your hand. •  Precision cursor control on more surfaces, including glass where other mice fail •  Wireless freedom for multiple devices with plug-and-forget Unifying receiver •  Recharging through your computer •  Fingertip controls for hyper-fast scrolling, quick-zoom and more •  Sculpted design cradles your hand for unmatched comfort Darkfield Laser Tracking for precise cursor control—even on glass The culmination of a groundbreaking five-year engineering effort, Darkfield Laser Tracking lets you track on more surfaces than ever—including glass, where other mice flat-out fail. Logitech's exclusive technology tracks mouse movements by producing a detailed micro-roadmap of the work surface. So now you can confidently use your mouse on surfaces you never could before like clear glass, lacquered wood and marble. Plug-and-forget Logitech Unifying receiver stays in your computer One tiny wireless receiver gives you many possibilities. The receiver is so small you can leave it in your notebook and forget about it. So you never need to unplug it when you move around, and your mouse is always ready when you are. Plus, this one receiver connects up to 6 Unifying compatible devices, allowing you to add accessories like a Unifying wireless keyboard without having to manage multiple USB receivers. Create The Combo That Works For You. USB recharging system ends battery hassles and downtime Recharge your mouse anytime, anywhere—even while you work. Use the USB cable for charging through your computer. From now on, you'll never need to look for batteries to get your mouse back in action so you can get back to work.  Hyper-fast scroll wheel puts you in total scroll control 20-page spreadsheet? Extra-long email thread? Spin the almost frictionless scroll wheel to fly through long documents, emails and web pages. Tilt the wheel left and right for side-to-side scrolling. You can even shift to click-by-click mode for precise, line-by-line navigation of lists, slides and photos. Fast or slow, you've got the control to get it done at your pace. Sculpted shape guides your hand for more control and comfort Imagine a mouse that feels so natural in your hand you actually forget you're using a mouse. The sculpted design cradles your hand for more comfort and less fatigue, even during marathon mouse sessions. And every control is intelligently positioned right at your fingertips, so you're in total control of every click, scroll, cut, paste and zoom. Package Contents Logitech Performance Mouse MX Logitech Unifying receiver Micro-USB charging cable User documentation System Requirements Windows-based PC Windows XP, Windows Vista, or Windows 7 USB port Internet connection Mac computer Mac OS X 10.4 or later USB port Internet connection