This mouse takes advantage of high technology Optic eye which offers sensor report rate 1500 times per second with micro digital camera. Such an advanced optical sensor technology permits the mouse to move on almost any surfaces without moving ball to collect dust. It helps your surfing on internet and zooming. If your hand has an excellent taste, this optical mouse is your only choice. The wheel provides easy scrolling and added convenience of an extra button.Ergonomic design to support the contour of palm for both right and left hand user. Solid-state Optical Navigation technology provides superior precision and smooth navigation and because of its no moving parts design, no machine required even after long time use.