This is an ELECOM KVMP-CUN PC switch. It's a switch that allows you to control two PCs with a single set of USB keyboard, USB mouse, and VGA display, switching between them with a remote switch. It also supports connecting a USB printer. For detailed specifications and usage instructions, please visit the ELECOM website's download section, select "Discontinued Products," search for this model, and download the user manual. I've been using this for a while. Before listing, I confirmed that it can switch between keyboard, mouse, and display on two PCs. As shown in the photos, the item includes the main cable and the remote switch cable.