Metal case which gives an impression of quality and numerous connectors (including 4 USB sharing between machines and dual VGA / DVI display). This is professional equipment. Attention must be provided cables, because nothing is provided: - VGA and / or DVI depending on your configuration, one machine to connect. - USB (such as printers), 1 per machine also. - Possibly jacks if you put sound Switch between machines via buttons on the front panel or via conventional keyboard shortcuts. Very good product.