The RollOn mp3 player is inspired by a bicycle dynamo. The battery is recharged by rolling the top wheel. Energy from sockets or batteries is unnecessary due to the use of kinetic energy. The cover functions as protection and a function switch. The front wheel has a function as a charge wheel and a multi functional adjust wheel. Songs and tracks can be downloaded and transferred by blue tooth or mini USB from your computer.

Concept
Rollon is a Mp3-player inspired by the traditional bicycle dynamo, and the way it is power by human activity. It is charged by rolling the charging wheel in your hands, on your knees, on a table or how ever you want to charge it. Rollon is an example of how sustainable design can result in a better product, not only because it is a "green" product, but because it gives the product new conceptual values (like emotional content, functions, usefulness, and aesthetics).

Emotional content
The product gives the users freedom to choose how he or she wants to charge it, and trigger playfulness and awareness about the use of energy in everyday living. The user never have to worry about running out of batteries, which enhances the feeling of reliability. The fact that it also gives you something to play with makes the user develop good feelings with the product.

Aesthetics
The shape is pleasant to look at, but also it also has a robust and playful character. The bicycle dynamo shape is also supposed to trigger nostalgic good feelings amongst people that recognizes it, and curiosity amongst others.

Semantics
The semantic effect of the shape looking like a bicycle dynamo tells the users that it can be recharged. Second, the more objective semantics of the shape tells you that the wheel is for spinning, (even without recognizing the dynamo shape).