This Switch box allows you to connect 2 computers to share printers. Features: Auto Switch easy installed and operated With this Compact Auto Switch， two Computers share one printer No external power supply required of this 2 Port Auto Switch On line LED indicated for active channel Computer Input Port : 2 ports Printer Output Port: 1 port Package Included: 1 x Auto Switch Parallel 2 to 1 (Note 1: Photo attached is for reference only， it may be slightly varied in items of colour， shape from the actual item delivered from time to time Note 2 : This unit does not include any Parallel Cables and Parallel cables need to be purchased separately for the amount of devices connected to the switch. Parallel Cables are available on www.newfroggy.com)