Directly connected with the computer， no external power supply， easy to use

* the second generation of USB HUB controller， support plug and play andthe hot swap function

Interface compatible with *USB1.1 2， support USB1.0/1.1/2.0， * built-in short circuit and overload protection device

* the plug does not need to switch， suitable for notebook computer， PDA， all kinds of small and portable type PC

* system support: Win95/98/Me/2000/XP， Linux2.4andMac os8.5 or later