Fan Sun Hat: This sun hat has a built-in cooling fan that provides strong and stable wind. The airflow flows downwards for rapid cooling of the neck and face. Full Protection: This summer fan hat is designed with wide eaves to achieve a large area of sun protection, effectively blocking the sun without blocking the line of sight. Low/Mid/High-level Adjustment: The cooling fan has 3 adjustable speeds to meet your different needs and works very quietly. 5-7 hours working time depends on different modes. USB Powered: The built-in rechargeable lithium battery is powered by USB without the need for additional batteries. This fan sun hat works with most computers, laptops, portable chargers, etc. Multi-Scene Applicable: This skin-friendly fan cap is perfect for the hot summer, outdoor activities, cycling, hiking, walking, golf, baseball sport, travel, fishing, daily life, and so on. Material: PC Color: blue Package List: 1 x Summer Fan Cooling Sun Hat