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Instructions for using the air pump: 1. Each indicator light represents 20% of the power, when the indicator light does not light up, it means that the power of the air pump is less than 5%, and should be charged in time. 2. Press the blue button twice to turn on and once to turn off. 3. Select only one suitable nozzle at a time. 4. Inflate: Attach the appropriate nozzle to the inflation port and turn on the pump to begin inflation. 5. Exhaust: Attach the appropriate nozzle to the exhaust port and turn on the air pump to start exhausting. Please do not leave the pump fully discharged for long periods of time and recharge it at least once a month during storage.