description:... it has a streamlined sport- car modeling and the buttonless and individualized color matches to those who always chase after outstanding performancefeatures:- three buttons + scrolling Wheel- high precision optical sensor- ergonomic design, for left- and righthanded use- connects to the USB- or PS/2-portsystem requirements:- PC Pentium 233 or higher- Windows 2000/XP/Vista or MAC OS 8.6 ++package content:- Genius Mini Traveler- USB to PS/2 adaptor- user's manualspecifications:- dimension: 91x49x32 mm- giftbox size: 235x123x39 mm- body weight: 62g