Thank you for choosing Fulllucky air duster! To make you better enjoy the superiority of the high quality air duster, please follow the instructions. If you have any questions about the products received, please contact us.How to Charge1.Insert the USB cable into the air duster charge port. The indicator light flickers red while it is charging, it will be always red when fan is fully charged.2.Connect the cable with a 5V/2A USB outlet, such as USB charger, cell phone adapter, laptop, power bank, however, a 5V/2A adapter would be the best choice in order to greatly shorten the charging time? To shorten the charging time, please connect the cable with a 5V/2A USB outlet, like USB charger, cellphone adapter, etc,. Some USB outlets might have insufficient output current, which will slow down the charging speed or even hinder the charging.? It is not recommended to use the product while charging, because it will not hold a charge while working.How to Use1. Release the nozzle from the nozzle hole and put it to the air outlet.2. Press Power on/off button each time to adjust one gear position (1 gear-2 gear-off).3. Press the Led on/off button to control the Led light.Note:1. when low power, the wind will be weak to prompt user to recharge in time2. The lithium battery is without memory effect, charge whenever you want. Keep fully charged is good for longer life of battery.3. The blades of products will be at high speed rotation. Do not put foreign body into it otherwise it may be damaged.4. Don't use battery when the surrounding temperature is over 60 degrees centigrade.Don't pinch or dissemble battery. 5. To ensure the performance and service life of product, please use our company specified accessories.