A compact wireless mouse with high-definition tracking. Contoured design Designed to keep either hand happy. Soft side grips and a comfortable shapeso youll feel good, even after long hours of use. 1-year battery life You can go for a year without battery hassles. An On/Off switch and smart sleep mode extend battery life, while an indicator light eliminates surprises.* Big on battery life? We are, too. Learn more. Logitech reliability You get the high quality and reliability that have made Logitech the global leader for miceplus a three-year limited hardware warranty. Logitech Advanced Optical Tracking Enjoy precise clicking and pointingon surfaces other optical mice cant handlewhile navigating your favorite websites thanks to Logitech Advanced Optical Tracking.