1.usb hub 4 port driver 2.Foldable,Convenient to carry 3.USB2.0 4.Special ... version 1.1/2.0,full speed up to 480Mbps single chip integrated processor,2,support four bus-powered USB hub ... downstream ports,3,built-in 3.3 voltage regulator allows single +5V operating voltage,resulting in reduced overall system cost.provide ... above Special Design Folding USB2.0 usb hub 4 port driver