Universal compressor with 12V or 230V power supply suitable for inflating different types of tyres, balls or air matrasses. Instructions for use: 1. Put the cigarette plug of the compressor into DC12V socket in the car. 2. Screw the air nozzle onto the tyre valve tightly, otherwise the air will not flow into the tyre. 3. When inflating the tyre, please pay attention to the pointer of the gauge which rises up as the pressure inside the tyre rises. Normally, two or three minutes are enough to make tyre reach rated air pressure 206Kpa (0.206Mpa). While reaching rated air pressure, turn off the switch, take off nozzles and plug and the inflation is complete.