Turn on the power button, select the unit you want, and press the plus or minus button to set what you need. Item Type: Car Air Pump. Special Feature: Digital Display Screen. 1 x Air hose. When the inflation is completed, unscrew the air tube to complete the inflation, and be careful to connect the tire inflation connector to see if it is hot; it is normal that there will be a small amount of air leakage when the connector is unscrewed.
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