Ultra-quiet motor, three-color hybrid charging fan, built-in 300MAH14500 lithium battery, distributed with a 0.2-meter USB cable, three-gear wind speed, built-in IC charging circuit for lithium battery, with over-charge and over-discharge protection, when charging the battery, the corresponding gear indicator will always light on, and the fully charged charging indicator will go out. Charging is safe and reliable. It is used for 2 hours in slow gear, 1.5 hours in mid-range, and 1 hour in fast gear.