Specification:1.FullycompliantwithUSB2.0Specification;BackwardsCompatiblewithUSB1.1.2.Minifullspeed4portUSB2.0hubs.3.maximumdatatransferrateis480Mbps.4.Supportupto127USBdevices.5.SupportSelf-PoweredModewithoptionalexternal2AACadapter.6.Provideupto500mAperportsufficientfordiversedevices.7.Individualportover-currentprotection8.Plug-and-Play9.Nodriverinstallationrequired.