high speed USB2.0 4 port hub, metal case, for scanner,digital camera,digital vidicon,audio system,input equipment etc. high speed USB2.0 ... , metal case, for scanner,digital camera,digital vidicon,audio system,input equipment etc.Metallic Hub: 1) Expand 4 USB ports, supply up to 500mA ... per port 2) Adopt the second age USB controller 3) No external power supply 4) Driverless, hot plug and play 5) ...