This keyboard and mouse are ergonomically designed to fit your natural comfortable position. Left, right, and scroll wheel mouse buttons keep your motions in control. With its 1600 DPI optical sensor, this mouse works on almost any surface with astounding accuracy. Stash it in your bag with your laptop and you'll be good to go. LED indicators illuminate Number Lock, Caps Lock, and Scroll Lock so you don't have to guess what's on or off.