Hand-friendly designThe full-size, contoured design with soft rubber grips feels good in either hand—even after long hours of use.Plug-and-forget nano-receiverSo small and unobtrusive, you can plug it into a USB port and forget about it. Plus, you can say good-bye to worries about lost receivers.18-month battery lifeYou 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.*Logitech Advanced 2.4 GHz wireless connectivityYou get the reliability of a cord with wireless convenience and freedom—fast data transmission and virtually no delays or dropouts.Smooth, responsive trackingYou’ll get right where you want to go with smooth, responsive cursor control, easy text selection, and effortless scrolling that touchpads can’t compete with.* Battery life may vary based on user and computing conditions.