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. This product is equipped with a battery. If you need to replace the battery yourself, please use for 's battery. Battery interface:For Product Name:Super Turbo Fan Product model:-02 Battery model:18650 Battery capacity:2000(ND)*5, 4.2V*5, total 21V Battery voltage:21V Charging current:1A Rated maximum power:150W Fan weight:274g Charging time:2-3 hours Working hours: (120