The Logitech® Marathon Mouse M705 lets you turn on ... and turn on. It uses much less power than similar wireless mice from other companies, so it will take up to three years between battery replacements. * Plus, it uses a small wireless receiver that stays connected to your computer, so your mouse is ready to use. - anytime, anywhere and for as long as necessary. Plus, super-fast scrolling means you’ll look through long documents and instantly find what you need. Laser degree tracking means you can control the cursor smoothly and quickly. And the well-groomed shape of the right hand means finishing work is as convenient as getting started.