... processor,2,support four bus-powered USB hub controller with embedded propriety processor,support four bus-powere downstream ports,3,built-in 3 ... .3 voltage regulator allows single +5V operating voltage,resulting in reduced overall system cost.provide up to 500mA current to ... models)5,OS:Win95 ORS 2.0,Win 98/se,Win 2000,WinME,and XP or above Box shape usb 2.0 mini usb hub 4 ports