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