Ecofan fan review (No electricity fan)

I open and show how to use the ecofan, needs no electricity Ecofan =sr_1_4_olp?ie=UTF8&qid=1480216390&sr=8-4&keywords=ecofan&condition=new Ecofan =sr_1_4?ie=UTF8&qid=1480216390&sr=8-4&keywords=ecofan