The main property of the pure tone radio is to be as sustainable as possible. The reason for the large body size is to allow a low powered speaker to be amplified without extra electrical power. The body acts as an acoustical amplifier and because of this the sound is amplified to great effect.
Another key factor to this design is the hand powered dynamo that is used to charge the battery within the device. This feature works much like the one that can be found in wind up torches. The components and materials used to design and manufacture this device will be recycled and mainly sourced from a sustainable