Working Long TimeBuilt-in 20,000mAh polymer battery camping fan can run for 60 hours at low speed and 16 hours at maximum speed; 5V/3A type-C input/output port and a 5V/2A USB output port for charging the fan conveniently, or use it as a power source to power other devices mobile phones, cameras, GPS, iPod. It's a lifesaver during camping, travel, power outages, and hurricane season. 4 Speeds and LED LightThe portable fan use turbo tech to drive more air in a faster way, even the lowest speed will meet most purposes, the electric fan can work for 16-60 hours after being fully charged (depend on wind speed) with remaining battery indicators to help you keep track of your power. 3-level brightness lights, soft and non-glare lights, designed to meet your outdoor lighting needs at night. Auto-Oscillating & 270° Rotation HeadCompared to other fans, it can horizontally auto-oscillate within 90° or 45°, 270° head rotation up and down. It provides wider coverage of airflow to in