Rendering showing body and finger grips - This MP3 allows the user to enjoy music while running and the inbuilt kinetic technology eliminates the need to charge the device. The action of running enables the device to charge itself, enhancing usability. As batteries are not required the concept is more environmentally friendly than existing MP3 players. The metal pads on the hand grip allow the user to read their heart rate, which is a frequent desire of people while exercising.