... tire inflator for emergency. Portable mini air pump with your car, Widely used for cars, off-road vehicles, small trucks, balls, ... free maintenance service for 3 years Modle Nameauto metal mini air compressorMaterialMetal(aluminum, alloy or stainless steel)Rated Power220WVoltageDC ... when the pointer reaches an appropriate air pressure, press the off switch , remove the power line and the gas nozzle, ...