不需要电池,只要在太阳光下就能让风扇转起来,让您清凉度过暑期。帽子尺寸大小可以调节,大人小孩均适用,棉布面料和硬衬挺刮的帽沿通风透气,结实耐用,做工精良。采用优质晶硅电池板提供动力,使用寿命长达10年。帽子遮阳,利用阳光照射电池板产生的电能,驱动风扇。光照越强,风扇转速越快。风扇直径6cm,帽子轻便,风力适中。郊游、徒步、上下班途中,它能为您带来一路清凉。 Do not need batteries, as long as the sun can make the fan turn up, let you spend the summer cool. Hat size can be adjusted, adults and children are applicable, cotton fabric and hard-lining scraped brim air ventilation, durable, well-made. Powered by high-quality crystalline silicon panels, the service life of up to 10 years. Hat shading, the use of solar radiation generated by solar panels to drive the fan. The stronger the light, the faster the fan speed. Fan diameter 6cm, hat light, moderate wind. Outing, hiking, on the way to get off work, it can bring you cool all the way.