The Performance Mouse MX™, with Logitech® most advanced tracking technology, puts the power to achieve in your hands. The Darkfield Laser Sensor—a Logitech exclusive—tracks flawlessly where optical and standard laser mice fail, working virtually anywhere—even on glass. This sculpted, right hand shape mouse includes hyper-fast scrolling and four programmable thumb buttons, so you’ll get more done—more quickly. The mouse connects with ease by simply popping the tiny Logitech® Unifying™ receiver in your computer, delivering long-range, advanced 2.4 GHz wireless connectivity. Plus, the battery is rechargeable.