600dpi ball mechanism and scrolling function for the daily use.Absolute compatibility with all the operational systems, without installation. hAf »yiA» сИ ' Щ : WARn&ITY SrrE k TLANTIS /1 : i *j where solutions begin TECHNICAL CHARACTERISTICS: Optical system: -600dpi ball mechanism Phisical characteristics: -Scroller -3 button (2+1 by scroller press) -Interface PS2 -Dimensions (mm): 125x60x36 Scroller function Ps2 connector Functionalities: -Plug and Play -Compatible with Micro