2 WAY AUTO PARALLEL PORT A B SWITCH for Printers, Scanners. Use one printer or scanner with 2 computers!! It works automatically, no need to turn a switch! Power Free Operation First Come First Served Parallel 2 to 1 Auto Switch, Transparent to User Timeout Selectable: 9/10/90 Endless seconds Available The PRINTER PARALLEL SWITCH work with ALL DESKTOPS AND LAPTOPS that have a PRINTER PARALLEL port THIS PRINTER PARALLEL Switch box allows you to connect 2 computers to share printers, scanners and any other Parallel devices.