Your hand can relax in comfort hour after hour with this ergonomically designed mouse. Its contoured shape with soft rubber grips gently curved sides & broad palm area give you the support you need for effortless control all day long. Youve got the control to do more faster. Flipping through photo albums & Web pages is a breeze especially for right-handers with three standard buttons plus Back Forward buttons that you can also program to switch applications go full screen & more. & side-to-side scrolling plus zoom gives you the power to scroll horizontally & vertically through your music library maps & Facebook feeds & zoom in & out of photos & budget spreadsheets with a click Two years of battery life practically eliminates the need to replace batteries. The On Off switch helps conserve power smart sleep mode extends battery life & an indicator light eliminates surprises. Battery life may vary based on user & computing conditions. The tiny Logitech Unifying receiver stays in your laptop. Theres no need to unplug it when you move around so theres less worry of it being lost. & you can easily add compatible wireless mice & keyboards to the same wireless receiver. Laser tracking means youll enjoy smooth responsive cursor control even on surfaces that cause problems for traditional optical mice such as polished or wood-grain tables. The laser sensor does not work on glass or mirrors. The full-size Logitech Wireless Mouse M510 gives you more control so you can do more with your mouse. The contoured shape with soft rubber grips gives you the support you need for all-day comfort. You can do more faster three standard buttons Back Forward buttons & side-to-side scrolling plus zoom make it a breeze especially for right-handers. Two years of battery life practically eliminates the need to change batteries while the tiny Logitech Unifying receiver stays in your laptop so youre less likely to lose it. & laser tracking means youll enjoy smooth responsive cursor control on just about any surface. The laser sensor does not work on glass or mirrors.