4 ports 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 without an external power supply, easy-to-use. 3.The use of second-generation USB HUB controller. 4.USB2.0 interface, support USB1.0/1.1/2.0, transmission speed 1.5/12/480MBPS. 5.Built-in short circuit current overload protection device. 6.System support: Win95/98/Me/2000/XP, Linux2.4andMac os8.5 or later version7.Streamline the design of ultra-micro. 8.Maximum support usb devices 127. 9.Use high-quality electronic components, to ensure stable operation "

4 ports USB 2.2 HUB & USB HUB