... port can provide electric current up to 500MA Commodity:USB Hub,4 ports usb hub Specification4 usb ports, each port can provide electric current up ... to 500MA. use the second generation usb hub controller. no driver required, really plug and play. support usb2.0 & usb1.1, the ... speed up to 480Mbps Wide used for USB devicess,such as Udisk, SD card, USB ...