Description: Multifunctional Use: This Solar Charging Fan Hat is great for outdoor activities, providing sun protection. Made with polyester material for a comfortable wearing experience, easy to carry aroundPortable and Energy Efficient: The solar and charging fan hat for adults features an upgraded solar power panel and a built in 1000mAh battery that can be fully charged in 3 hours for 8-16 hours using time and it is also with overcharge protection for extended useProper Fit: Designed with an adjustable tape, this outdoor sun protection duck mesh hat is with head circumference 54 cm-59 cm/21.26 inches-23.23 inches, suitable for both men and womenAdjustable Wind Speeds: The fan in the sun hat can be adjusted to three different wind speeds by pressing the switch button, press once for low speed, twice for medium speed, three times for high speed, and four times to turn off the fanSolar Mode: When using the solar mode of the sunhat, there's no need to switch on or off, and it can only be used outdoors under sufficient sunlight which directly powers up the fan. Please note that wind speed cannot be adjusted in this mode (not suitable for indoor use or on rainy days) Specification: Material: Polyester Size Chart: Head circumference 54 cm-59 cm/21.26 inches-23.23 inches Package Includes: 1 Sun Hat1 Cable Note: Please allow slightly errors due to manual measurement and different monitors.