... HUB, Support USB 2.0 standard, Drawer design,support 13 port work at the same time. Features: One USB port ... extension for 13 USB portsUsing two USB 2.0 high speed 7 channel ... .6 or higher version,plug and playCan be used the 13 USB ports in the same time,such as bar code ... hard disk box,no external power supply USB drawer design 13-port HUB,USB 2.0 HUB ...