Extend 1 USB port to 4ports, each port supply 500mA (total Max.).
USB ports in round shape, convenient for USB plug and pull.
USB1.1 spec. compatible USB2.0, full speed at 12Mbps.
USB bus-powered, no external power adapter.
Driverless, plug and play.
System support Win98/98se/Me/2000/xp, Linux/Mac OS