The rocking fountain pen

This kind of rocking fountain pen is designed basing on the principle of electromagnetic induction of Faraday by a designer of China. When you use this kind of pen, it will produce electric current because of its rocking, and the electric current will charge for the builtin battery. There are related operating equipments of sound volume, channel regulation, headphone jacks, speakers in it. So the people can play music, listen to the news when use this kind of fountain pen.