Additional Features Hemisphere Design The curving hemisphere, designed by Phillipe Starck, creates more natural comfort as you click with either hand. Unique Light Stripe An LED light stripe illuminates the center of the mouse. Choose from orange or blue. Optical Technology An optical sensor tracks mouse movement, giving you greater durability, increased speed, improved accuracy, and more consistent performance. Comfort for either hand The latest mouse design makes clicking and scrolling more comfortable and convenient—no matter which hand you use. Effortless scroll wheel Save time and effort. Easily navigate documents and Web pages without having to click the on-screen scroll bar with your mouse. | 
