Manufacturer: Logitech. The dark M305 has a natural shape and non-slip, rubber side panels providing extra comfort and control, even after long hours of use, while the ridged wheel provides a better grip for scrolling. This mouse also has responsive and smooth cursor control with high-definition optical tracking (1000 dpi). The Plug-and-forget nano-receiver is so small and unobtrusive, you can plug it into a USB port and forget about it. Plus, you can say goodbye to worries about broken or lost receivers. You get the reliability of a cord with cordless convenience and freedom, fast data transmission and virtually no delays or dropouts. With intelligent battery management, an indicator light to eliminate surprises, and automatic sleep mode which turns off the mouse when you’re not using it, you’ll get months of use and added convenience.