Comfortable shape for either hand Right handed? Left handed? Either way, the contoured shape supports your hand in all-day comfort. And the mouse buttons and scroll wheel put comfortable control right at your fingertips. Precise cursor control With an 800 dpi optical sensor, you've got the cursor control you need to quickly and accurately point, highlight, cut and paste. Versatile scrolling plus zoom Scrolling plus zoom lets you instantly zoom in or out and scroll horizontally and vertically. Perfect for working with spreadsheets and presentations.