The strength of the wind and the sun

I thought this was an interesting gadget. A charging device that feeds energy from the sun and wind ... (though the latter seemed rather dubious to me how such a small “cooler” can charge something)
According to the manufacturer, the battery charges in 1 hour on a sunny and windy day, and can charge up to 5 mobile phones or 10 iPods.

I was pleased with the design of the device, which is unusual for devices of a similar plan ...