Effortless scroll, very precise with every sensitive movement. Adopts advanced optical sensor technology offers exact tracking and smooth control. Super slim and portable. Lightweight and compact design make it easy to carry. Ultrathin streamlined ergonomic design. Superior quality and solid structure. 2.4GHz wireless features photoelectric, frequency hopping spread spectrum technology. Reliable, ease-of-use and gives a fast data transmission with no delay or dropouts. Precise navigation across the documents and websites with dedicated scroll wheel.