Something echo friendly :)
Pros:-

• first thing it is echo friendly it is charge on kinetic energy as you move around.
• The Ampy-Move is nucely packaged, and the device feels solid and well-constructed when you hold it. It has a comfortable, rubberized texture when you hold it in your hand and initially feels as though it has a nice weight.
  Cons:-
• You would have to shake the Ampy-move continue, to fill up the battery cells. Regular battery packs offer more capacity for far lower cost.
• it required expensive peripherals.
• Battery capacity is too small takes too long to charge.
• you couldn't fill the charging led from 1 to 4 until you running through a 60+ hours marathon.
  In this product there are more negative feedback then good.