5-inch fan two-color mixed desktop charging fan, distribution of a 3.7V 1200mAh18650 lithium battery, distribution of a 0.5m USB line, three wind speeds, fan trigger switch, built-in lithium battery special IC charging circuit, with overcharge and discharge protection, when the battery is charged, the corresponding gear indicator will always be on, the charging indicator will be off, the charging is safe and reliable, slow use 4 hours, medium 3 hours, fast 2 hours.