Battery power: 0.3W (power), solar panel diameter 6.8cm, fan diameter 6.5cm commodity weight: 380g Product Size: 29x23x17cm product details 01. Solar panels The polycrystalline solar panel adopts a laminate, and the laminate can be exposed to the sun and rain without yellowing. Safe without battery, direct solar power 02. Big fan Directly convert solar energy into electric energy to turn the fan, no battery and switch installed, the sun will turn, no sunlight will not turn, the stronger the sun, the greater the wind, the real intelligent cooling 03. Regulator The size of the hat can be adjusted, and the circumference of the inner sleeve of the hat can be adjusted according to the size of the head, which is suitable for all kinds of people to use~ Don't worry about whether you can wear it! 04. Fixed buckle rope The buckle of the inner sleeve of the hat can be adjusted freely to ensure a firm and comfortable wearing. Don't worry that the hat will fall.