5-inch fan two-color mixed telescopic folding charging fan, distributed with a 3.7V 800mAh 18650 lithium battery, distributed with a 0.2-meter USB cable, has three wind speeds, fan trigger switch, built-in IC charging circuit dedicated to lithium battery, with over-charging and over-discharging protection, when the battery is charged, the corresponding gear indicator will always light on, and the full charging indicator will go out. Charging is safe and reliable. It is used for 3 hours in slow gear, 2.5 hours in mid-range, and 1.5 hours in fast gear.