【4000mAh Battery Capacity】Compared with other portable fans on the market, this model is equipped with a larger battery capacity of 4000mAh (twice that of other fans), supporting 5-20 hours of working time. full charge. The battery life depends on different speeds: speed 1 (20 hours); speed 2 (15 hours); speed 3 (5 hours). 【Portable/Desktop Fan】 This mini portable fan can be used as a handheld fan outdoors or as a mini desktop fan on a flat table in the office. There is a non-slip pad at the bottom of the base, which can be used Stay stable when placed on the table. 【USB Charging】 The mini portable fan adopts USB charging, it only takes 3 hours to fully charge. Support USB charger, car charger or computer USB charging. 【Easy to Clean & Mini Size】This mini portable fan has a removable cover for easy cleaning, you can separate the cover and fan counterclockwise. Besides, it's small Easy to carry in your bag. Perfect for commuting/traveling/shopping/picnic/office. It will be one of your