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 swapping; Item NO: MDTC-E004 4 ports usb 2.0 hub ... power 500mA (max.); USB 2.0 high speed transfer port, compatible USB 1.1 downwards; the transfers speed is up to be 480Mbps No ...