The US424 is a 4-port USB peripheral sharing device that enables 4 computers to share the use of 4 USB devices – a keyboard, mouse and up to two peripheral devices. It eliminates the added expense of having a separate USB keyboard, mouse and peripheral device(s) for each computer. 4 built in USB ports – all-in-one design allows for a neat and tidy installation that reduces cable clutter. Simple port selection via remote port selector for convenient switch placement. Non-powered (supports optional USB power adapter).