Features: Keep cooling effortlessly with the solar powered fan hat with 3 speed wind adjustment and builtin digital display for battery monitoring. Equipped with 300MA solar charging capacity, this breathable cooling fan hat eliminating heat during sunny/cloudy days through efficient energy conversion and storage. Perfect for outdoor workers, hiker, and commuters needing durable sun protections and ventilation during extended activity. Optimized for fishing, camping, or cycling under harsh sunlight, its auto adjusting fan maintains comfort in extreme heat condition. Durability and multipurpose sun hat combines simple design with practical functionality for sustainable outdoor lifestyles. Specifications: Component: Polyester Product Size: Approx. head circumferences 54-58cm/21.26-22.83inch Power Supply: Solar/USB Charging Battery Capacity: 300mAh Color: 4 optioanl color as pictures shown Package Includes: 1PC Solar Fan Hat note: Please allow 0-1cm error due to manual measurement Due to the differences between different monitors, the picture may not reflect the actual color the item.