1,1mUSB 2.0 EHCI and USB 1.1 OHCI Compliant 2,Backward compatibile with USB 1.1 devices 3,Transfer rate: Each ... )1,1mUSB 2.0 EHCI and USB 1.1 OHCI Compliant 2,Backward compatibile with USB 1.1 devices3,Transfer rate: Each ... ,Connects up to 127 USB devices simultaneously5,Over current protection, each port 500mA6,External port: USB-A x 47,Internal port: USB-A/Pin header ...