Hat materialcottonBattery capacityIncrease battery capacity Explosion-proof lithium battery (built-in 400 mah lithium battery)Charging indicatorRed light when charging, blue light when full (with automatic overcharge protection function)The head weightLightness (safe and light design, both beautiful and practical)Wind power adjustmentAdjustable (the size of the wind can be adjusted, and the electricity storage can be used for about 5-8 hours at a time)Fan powerWind strengthening (large wind configuration with fan blade diameter 7CM)Charging indicatorRed light on charge, blue light on chargeThe head weightlightWind power adjustmentCan be adjusted.Fan powerThe wind strengthenedSuitable for gift occasionsBirthday, fishing, festival, trade show, advertising promotion, employee benefits, anniversary celebration, business gift, opening ceremony, award ceremony, public relations planning