Tripp Lites ultra small 7-port USB 2.0 hub is the most versatile and powerful hub on the market. This USB 2.0 certified hub allows you to connect up to seven USB devices to a single USB port on a Notebook/PC/MAC. This hub has been certified by the USB-IF to support Hi-Speed data transmission rates up to 480Mbps. Perfect for both the mobile and desktop user. While the hub will function perfectly in virtually all cases without needing external power, a compact, multi-voltage AC adapter (110/220V ) has been provided for the rare circumstance when connecting a power hungry device. This USB 2.0 device is backwards compatible so that it will function with both USB 2.0 devices as well as USB 1.1 peripherals. Over-current protection safeguards connected equipment from overvoltages. Includes stand for upright positioning. Tripp Lite offers a lifetime replacement warranty on all cable products.