1.800CPI resolution, precise and fast. 2.Super mini shape especially for the laptop users. 3.Optical tracker inductor makes the orientation of the screen cursor more smoothly and frequently. 4.The anti-slip pad with ABS materials makes the mouse move freely in different kind of situations. 5.The retractable wire design is convenient to take, and it makes your work more effective. 6.Adopt precise 3D idler wheel orientation; the life span of the excellent key switch is twice as long as the normal ones. 7.Plastic package.Interface: PS/2，USB, U+P