The object is a metal unit housed in a blue wooden case (open in both the front and the back). On the front of the object are numerous plugs, knobs, toggle switches, and a selector switch. Sample labels (all Dymo) on the front are "CLOCK PERIOD," "PLOTTER," "LIGHT PEN," DATA TERMINAL 2," and "INTERRUPT." On the back of the object are a fan, 14 cable connectors, and one power connector.