The 4-Way USB Manual Switch enables four PCs easily share one USB device such as a printer, scanner, or hard drive. No more plugging and unplugging between your computers. Features: To share a usb peripheral like a USB camera, printer, keyboard, mouse, scanner, or modem. You will need one USB A-B cable from each computer to the switch box. And another A-B cable from your device to the switch. The USB switch box pictured has 4 B type connectors and 1 A type connector.