Rowe Customusic is a background music system[1] from the 1960s and 1970s.
Up to six Fidelipac type C endless-loop magnetic tape cartridges can be loaded in the player, allowing up to 60 hours of playback.
The current cartridge number is indicated on a seven-segment display.
Automatic track advancement was triggered by a conductive tape strip on the splice of the tape loop, or manually by pressing a button.
Another switch located next to the power switch disables cartridge changeover, replaying only the current cartridge.