Belkin Hi-Speed Stackable USB 2.0 Hub with 4 Ports (F5U234v1) Stackable, reversible design compatible with USB 2.0 and 1.1 4 high-speed 480Mbps downstream ports; convenient plug-and-play installation Enables hot-swapping; allows cascading for use with up to 127 USB devices Over-current protection guards your computer and peripherals Backed by a lifetime warranty