1)4 usb ports, each port can provide electric current up to 500MA. 2)use the second generation usb hub controller. 3)no driver required, really plug and play. 4)support usb2.0 & usb1.1, the speed up to 480Mbps 5)Wide used for USB devicess,such as U-disk, SD card,USB mouse\keyboard,MP3, MP4, digital camera. OS support ： Windows 98, Windows 98SE, Windows 2000, Windows ME , Windows XP ，Vista Mac OS 8.6 or over version
