... ,audio system,input equipment etc. high speed USB2.0 4 port hub, metal case, for scanner,digital camera ... second age USB controller 3) No external power supply 4) Driverless, hot plug and play 5) Internal ... over current protection circuits6) Support compatible USB 2.0, full speed up to 480Mbps 7) Support OS: ... XP, Linux 2.4 and Mac OS 8.5 or over version high speed USB2.0 4 port hub, metal case ...