Microsoft Optical Technology replaces the old-fashioned mouse ball and works on virtually any surface. Easy and comfortable to use, this optical mouse is a great choice for it‘s value. Now you can experience the benefits of the world‘s most powerful optical technology. The Microsoft optical sensor replaces your old-fashioned mouse ball. Capturing 6, 000 frames per second, it delivers up to four times the performance of other optical mouse products. This superior tracking speed translates into smooth, accurate cursor performance and it works on most surfaces. No mouse pad! The ambidextrous design is comfortable whether you mouse with your left or right hand.