This 800 DPI USB optical mouse with scroll wheel can be used with all types desktop and laptop computers with one USB port. Just plug it in the USB port of your computer, it will start working at once. Meanwhile, the all-terrain optical sensor provides you smooth tracking and maximum surface coverage virtually in any environment ! Description:3D Optical Mouse with scroll wheel can be used with all types desktop and laptop computers.It confirms to the shape of your hand for optimal support and comfort. Perfectly fitting for either hand, help you work longer without discomfortThe roll wheel can be easily guided pleasantly and used as the third usable key of USB Optical Mouse.Advanced optical sensor allows high speed movement and pinpoint accuracy on almost any surface.800 dpi, USB interface, fast movement, easy scrolling on the web.Give off  light at once plugged in to the USB port of desktop or laptop and it will start working at once.Laptop Optical Mouse is compatible with USB 2.0 & USB 1.1Optical scanning on almost all surfaces, No mouse pad needed, functioned on the most surfaces.Work with: Windows 2000/ XP/ VISTACable length: 142cm (approx.)Colour: GreenDimension: ~9(L) x 4(W) x 2.7(H)cmWeight: 78gPackage Included:1 x Desktop Optical Mouse