1. plug and Play 2. Upstram (root port) for connect to computer 3. 4 Downstram port for connect to USB peripheral equipment 4. USB 1.1high-speed hub has four ports that will connect to either the USB revision 2.0 high-speed or the USB revision 1.1 peripheral device 5. Fully compliant with the USB 1.1 specifications 6. .Can connect up to maximum of 127 USB devices to PC through daisy-chain 7. Increased bandwidth of 480Mbps (exceeds that of IEEE 1394 firewires with 400Mbps 8. Allows to connect devices that consume a great deal of bandwidth such as external storage devices, scanners, printed, DVD drives, CD-RW drives, MO (magneto-optical) drives, and digital cameras/camcorders to computer 9. High-speed of 480Mbps data transfer rate (vs. 12Mbps of USB 1.1 and 400Mbps of IEEE 1394 firewires) 10. Plug and play capability with USB devices 11. Four external auto speed selectable USB type A downstream ports, supporting 1.5, 12, and 480Mbps 12. Supports Win 98, 98SE, 2000, ME, XP and iMac