Mini USB HUB (4 Ports)Expand for usb port, supply up to 500mA current per portAdopt the second age USB controllerNo external power supplyDrivertess.hot plug&jplayInternal over current protection circuitsSupport USB 1.0/1.1.compatible USB 2.0,full speed up to 12Mbps.Design with super streamline & miniSupport OS:Win 95 OSR2/98SE/ME/2000/XP,Linux2.4 and Mac OS8.5 or over versionChains up to 127 USB drives

USB 2.0 4 PORT HUB