Three-color mixed installation neck charging fan, with hose, built-in a 3.7V 18650 lithium battery, distribution of a 0.5m Huawei head USB line, powered by a super quiet 130motor, with three wind speeds, 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 for 4 hours, mid-range for 3 hours. Fast gear for 2 hours