Sun harmonics [China]

The solar panel of 15 watts backpack is foldable. Usually it looks like an ordinary fashionable backpack and is able to contain lots of stuffs. When having demand for electricity, the only thin to do is pull the zipper, unfold the panel entirely in the sun, continuous power support will be eaily realized. Charging is very easily, just via a USB connection. The solar backpack can be used for laptops, GPS, Blue earphone, telephones, etc.