high speed USB2.0 4 port hub, metal case, for scanner,digital camera,digital vidicon,audio system,input ... equipment etc. high speed USB2.0 4 port hub, metal case, for scanner,digital camera,digital vidicon,audio system, ... 4 USB ports, supply up to 500mA current per port 2) Adopt the second age USB controller 3) No ... 2.4 and Mac OS 8.5 or over version high speed USB2.0 4 port hub, metal case(Model# ...