JISULIFE F2B Handheld Portable Fan. Equipped with a large 4000 mAh battery, this compact fan delivers 5-20 hours of runtime depending on the speed. Large Battery Capacity: 4000 mAh Long Battery Life: 5-20 hours with one full charge (depends on different wind speeds) 3 Wind Speeds Fast Charge in 3 Hours Easy Cleaning: Detachable Cover
