MDTC-E004 4 ports usb 2.0 hub 1,4 ports 2,supports USB2.0/1.1, 3,No driver required,plug and play,support hot ... 4 ports usb 2.0 hub Feature Extend 4 USB ports,each supplies power 500mA (max.); USB 2.0 high speed transfer port, compatible USB 1.1 ... circuit protection setting, protect your computer and device from damaging. Internal USB line LED will flash to indicate the operation statusStandardsFCC, CE ...