7-inch fan three-color mixed desktop with portable battery with desk lamp function charging fan, factory distribution of a 3.7V 1200mAh18650 lithium battery, distribution of a 0.5m USB cable, can be required to add an extra 18650 battery, often press 2 seconds table lamp light, and then often press the table lamp off, there are three wind speeds, fan trigger switch, built-in lithium battery special IC charging circuit, with overcharge and discharge protection, battery charging, the corresponding gear indicator light will always be on Full charging indicator will be off, charging is safe and reliable, slow use 3 hours, middle 2.5 hours, fast 1.5 hours.