Experience smooth, accurate performance with Microsoft Optical Technology. The compact, stylish design of this three-button mouse makes it the perfect notebook accessory.Optical technology refers to the use of an optical sensor to track mouse movement, rather than the traditional use of mechanical parts. As a result, optical mouse products work on most surfaces and offer you better durability, increased speed and accuracy, and consistent performance.Navigate documents and Web pages effortlessly without using the on-screen scroll bar, saving time and effort. Ambidextrous design makes working more comfortable, whether you mouse with your left or right hand.