... .0 4 port hub USB2.0 Version, compatible with USB1.1 4 ports, and power up to 500mA each port 2nd generation ... usb 2.0 4 port hubUSB2.0 Version, compatible with USB1. ... 1 4 ports, and power up to 500mA each port 2nd generation Hub controller No need adapter, and no need driver program ... above Streamline & slim figuration design.... usb 2.0 4 port hub