USB1.1 USB HUB USB 4 Port USB HUB1) USB1.1 Version,2) 4 ports, and power up to 500mA each port3) 2nd generation Hub controller4) No need adapter, and no need driver program5 )Truly plug & play and hot swapping capability 6) Full data transfer rate up to 480Mbps7) Support Win95 osR2/98SE/Me/2000/XP, Linux2.4andMac os8.5 or above8) Streamline & slim figuration design.... USB1.1 USB HUB