This is Parallel 4 Ports Automatic Printer Sharing Switch. This sharing device can connect four computers. Easily installed and operated. Good choice for you!                                    Features            Four computers share one printer<br>No external power supply required<br>Easily installed & operated<br>On line LED indicated for active channel<br>                                                                                                Package Includes            1 x Parallel 4 Ports Automatic Printer Sharing Switch<br>