... USB 2.0 HUB & USB HUBMaterial:ABS1.One USB interface to expand into four, small, practical, convenient, each supply up to 500MA, 2.Directly connected with the computer ... of second-generation USB HUB controller. 4.USB2.0 interface, support USB1.0/1.1/2.0, transmission speed 1.5/ ... usb devices 127. 9.Use high-quality electronic components, to ensure stable operation " 4 ports USB 2.2 HUB & USB HUB