ATEN 4 Port 4 x USB Peripheral Sharing DeviceATEN 4 Port 4 x USB Peripheral Sharing Device 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. The US424 all in one design allows for a neat and tidy installation no need to connect 4 separate USB cables to the computer,