Just using thumb can be controlled accurately
No need to clik the scroll bar on the screen; Simply scroll wheel, you can move around in documents and Web pages
Adopting optical sensor technology
Design two custom keys, convenient for surfing, drafting and playing games
USB interface(can be equipped with PS/2 interface)
Plug and Play; Easy installation, Free Driver
Resolution: 800 DPI
Dimension: 12cm*4cm*5cm
Length: 1.5M