Optical Technology replaces the old-fashioned mouse ball and works on virtually any surface. Easy and comfortable to use, Basic Optical Mouse is a good choice for value. 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. The ambidextrous design is comfortable whether you mouse with your left or right hand.