The generator bike uses muscular power to generate energy, which can be used to run various consumers (devices, lightbulbs).

If a consumer only uses a little energy, the pedal resistance is low. When a lot of energy is consumed, the pedal resistance is correspondingly high.

In this way the various energy consumption levels of different consumers can be ‘discovered’ in an entertaining and memorable way.

Whereas the energy-saving lamp is illuminated without too much effort, hard work is needed for light from the conventional filament lamp. Athletic performance is called for if the kettle is also switched on. Up to four devices can be operated simultaneously from the 12V output sockets available.