Light blue electrical device in box

The photograph shows a light blue plastic electrical device placed in an open cardboard box with black plastic parts and a long cable. A circular ventilation grille is visible on the top of the device, with other black parts and control or mounting elements at the sides. Scuffs, scratches, dirt and dust are visible on the plastic, cardboard, cable and surfaces of the parts.

Code: nocode1439
Category: Electrical
Subcategory: Other
Period: 1970s, 1980s
Material: Plastic, Paper, Textile
Colour: Blue, Black, Brown