size(mm) 118?1?6 weight(kg) 0.1316 Resolution(dpi) 1600dpi Key-press life 150Million Safe certificate CE\FCC fafety Class I Laser Product Scanning speed 1500-3000/s Easy scrolling under:: Compatible with windows 95/98/Me/NT4.0/2000/XP Connector PS/2, USB .U+P