Do more, more easily with your mouse. with soft rubber grips and a contoured shape, this full size mouse provides all-day comfort, while back/forward buttons, side-to-side scrolling plus zoom and programmable buttons empower you to click, scroll and zoom with the flick of a finger. enjoy laser tracking for smooth cursor control and two years of battery life. comes with a tiny logitech unifying receiver that stays put in your computer, so you can plug it in, forget it, and add up to six unifying compatible devices without additional usb receivers