Product use: 1. Power on/off: Connect the battery and long the power button to turn the phone on and off. 2. Start mode/gear switching: Manual mode: long the start button, the device start to blow out air, release the start button to stop (third gear state) Automatic mode: Click the start button to turn on the , click again to switch to the second gear, and click again to shut down. 3. Indicator light: The marquee speed is synchronized with the gear position. When the marquee flashes, it means that the battery is low and needs to be or replaced. 4. Safe work: This product adopts low temperature working mode and not overheat. Battery interface: For Please note! No battery or charger included as standard! Product parameters Product Name: Super Turbo Fan Product model: -02 Battery model: 18650 (not included) Battery capacity: 2000(ND)*5, 4.2V*5, total 21V (not included) Battery voltage: 21V Charging current: 1A Rated maximum power: 150W Charging time: 2-3 hours Working hours: (120