A wireless mouse that delivers a better mix of precision and comfort-with designed-for-Web scrolling. Wheel for the Web Say good-bye to the tricky touchpad. Micro-precise scrolling makes everything you love to do online easier. A comfort to many Treat your hand to the comfy, contoured shape and soft rubber grips of the best-selling shape in the world. 18 months of fun With up to 18 months of battery life, it's so hassle free you might just forget it runs on batteries.