features:Enhanced precision with optical engine, eliminates moving parts and dust accumulationOriginal patent owner (US Patent No. 5,530,455)Suites for left - & righthanded useConnects to USB-portsystem requirements:Windows 98/2000/ME/XP - MAC OS X or higherpackage content:Genius XScroll mousespecifications:- body weight: 99,5g- body volume: 110x55x30 mm- gift box volume: 95x40x130