Belkin F4U016 4-Port Desktop USB Hub with Power Supply Compatible with Mac and PC, Support for plug-and-play specifications, Support for "hot swapping" of USB devices. Four downstream USB ports for plug-and-play connectivity. Hub is self-powered, Cascade devices with additional hubs and connect up to 127 USB devices to a single port. Fully compatible with USB 1.1 and USB 2.0 devices.