Ultra-quiet 300 motor, 4-color mixed solar hat charging fan, built-in 3.7V 14500 300mah lithium battery, distributed with a 0.5-meter Huawei USB cable, toggle the switch upward to directly supply power to the solar panel and drive the fan to work directly, toggle the switch downward to charge the battery to work triggers the first gear wind speed, then triggers the second gear wind speed, then triggers the third gear wind speed, and then triggers the fan to turn off. The fan is used in slow gear for 2.5 hours. Mid-range 2 hours, fast gear 1.5 hours, built-in IC charging circuit dedicated to lithium batteries, with over-charge and over-discharge protection. When the battery is charged, the corresponding indicator light will always be on, and the full charge indicator light will go out, making charging safe and reliable.