Ultra-silent 300 motor, three-color mixed hat charging fan, built-in 3.7V 14500 300mah lithium battery, distributed with a 0.2-meter Huawei USB cable, triggered the first gear wind speed, then triggered the third gear wind speed, and then triggered to turn off the fan. The fan is used in slow gear for 2.5 hours, mid-range for 2 hours, and fast gear for 1.5 hours. The built-in IC charging circuit for lithium batteries, with overcharge and overdischarge protection. When the battery is charged, The corresponding indicator light will always be on, and the full charging indicator light will go out, making charging safe and reliable.