1)ExpandsfourUSBportsupplyupto550mAcurrentperport2)Usesasecondgenerationcontroller3)Noexternalpowersupplynecessary4)Driverless,hotplugandplay5)Internalovercurrentprotectioncircuits6)SupportUSB1.0/1.1,USB2.0,fullspeedupto480Mbps7)OSSupport:Windows95OSR2/98SE/Me/2000/XP,Linux2.4andMacorover8)Chainsupto127drives