Sun Solar Power Cap with Cooling Fan for Out Door Golf Mountain Climbing Baseball Hats - Black - 3S60498214

Built-in 400mAh lithium-ion battery
By security and plastic flocking production, safety, not too heavy pressure sore head, wearing comfortable, feel is good
Polycrystalline solar panel adopt pressure layer board, but the long time and not yellow, security does not need to battery, solar power drive directly, do not need electricity, zero wiring zero trouble
With solar energy directly into electrical energy to rotate the fan and no installation sunshine will turn battery, battery big cold wind
Hat which can be adjusted according to the head size firmness, feel is flexible, safe stable, adjust the up is very convenient
Breathable empty hat design, so as to achieve comfortable and breathable, light cool effect