Once you step up to the advanced precision of the Logitech MX™ Optical Engine, you'll never look back. This amazing high-resolution sensor measures the smallest motion to give you instant response to even your fastest movements. Once you plug it in, you'll enjoy the difference immediately: from the ultra-smooth, precise tracking to the sleek silver and black design to the comfortable sculpted shape that fits both left and right hands. Plus, a collection of advanced features will streamline frequent tasks like scrolling through long documents, switching between applications, and navigating the web.

Enjoy smooth, trouble-free operation thanks to an advanced optical sensor
Zip back and forth between open documents with the handy Quick Switch button
Use two convenient buttons to navigate forward and back in your web browser
Easily scroll through long documents, without having to move your mouse an inch
Get comfortable with its sculpted shape that fits in either your right or left hand...