You'll enjoy smooth cursor control: precise tracking and easy text selection on the surfaces where you use your computer most. You can surf the Web with more comfort and ease thanks to the contoured design with soft rubber grips. And your mouse is easy to slip into a bag when you want to take it with you. The tiny Unifying receiver connects up to six Unifying-compatible devices with a powerful: reliable wireless connection (up to 25 meters). You can go a full year without battery hassles. The On/Off switch helps conserve power: smart sleep mode extends battery life and an indicator light eliminates surprises. You get a mouse you can count on with the high quality and reliability that have made Logitech the global leader for mice plus a three-year limited hardware warranty.