description:...the soothing shape and color integrated with the roller and the smile-like button design are comfortable for both right and left hand users
features:- optical sensor with an resolution of 800dpi- comfortable fit for either hand- port: PS/2system requirements:- IBM PC Pentium 233 compatible or higher- Windows 98/2000/ME/XP/XP x64/2003 & Vista- available PS2- portpackage content:- Genius NetScroll 120 Black PS/2specifications:- body weight: 130,5g- dimensions: 110x55x30 mm- gift box dimension: 170x90x40 mm