Ships from HongKong. Quick and precise navigation: Scroll wheel and Microsoft Optical Technology let you move quickly and accurately through documents. Space saving contoured design with textured side grips provides comfort in either hand. size:5.8*11*2cm. The cable length with Plug & Play USB connection is the perfect size to stow away in your laptop case when traveling between your home and office or for business. 1600 dpi optical sensors provide precise and swift cursor movement.