4ports usb hub1) USB2.0 Version, compatible with USB1.1
2)4 ports, and power up to 500mA each port
3) No need adapter, and no need driver program
4 )Truly plug & play and hot swapping capability
5) Full data transfer rate up to 480Mbps
6) Su
Detailed introduction to plastic 4-port usb 2.0 hubs with high transmission rate no need extra prower:
4 ports usb hub
1) USB2.0 Version, compatible with USB1.1
2) 4 ports, and power up to 500mA each port
3) No need adapter, and no need driver program
4 )Truly plug & play and hot swapping capability
5) Full data transfer rate up to 480Mbps
6) Support Win95 osR2/98SE/Me/2000/XP/Vista/Win7
Linux2.4andMac os8.5 or above