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