... Hub: 1) Expand 4 USB ports, supply up to 500mA current per port 2) Adopt the second age USB controller 3 ... power supply 4) Driverless, hot plug and play 5) Internal over current protection circuits6) Support compatible USB 2.0, full speed up to ... / XP, Linux 2.4 and Mac OS 8.5 or over version 4port USB2.0 high speed hub(model#PG-USB ...