The IOGEAR 4x4 USB switch is a USB 2.0 peripheral sharing switch allows four computers to share up to four USB devices, such as keyboard, mouse, printer, portable hard drives, etc.This device eliminates the cost to have multiple sets of USB devices for each computer. It also cuts down cable clutter of your work area, as well as the trouble to move from one computer to another. Switching from computer to computer is easy with the press of a button with LED to indicate the selected computer. You can also charge and sync your mobile devices with the computer through this unit.