A film strip on a 16 mm film loop synchronized with a built in audio cartridge. The strip is a series of still frames and functions like a slide show. The audio tape is simply a Lear Jet Stereo 8 cartridge glued to the bottom of the film container. Auto Mate 8 cartridges were also used (Teoli 2024). Only two tracks are used: one contains the audio and the other the tone that advances the film to the next frame. The film container holds the loose loop of film and a mirror at a 45° angle, which reflects the frame into the device optics.

The projector here is the La Belle Duo 16, which shows the images on a self-contained screen. Other models, like the Tutor 16, projected onto a wall. There is a receptacle to plug in a wired remote control (missing in this example). La Belle projectors were portable and were commonly used by salesmen on the road or in stores at point-of-sale. In this example, both the cartridge and the projector have been branded by Agri-Max Marketing Ltd.

La Belle Industries sold audio/visual equipment. One of their brochures describes the company as "Original manufacturers of synchronized slide/sound equipment for training, selling, promotion, public relations, and production guidance" (Weis 2014). The synchronization of film and audio seems to have been their specialty.