This tire inflator portable air compressor, designed to inflate car and bicycle tires, can also inflate a lot of things inside your vehicle while traveling or on a trip. Especially, since our car tire pump also has a plug for connecting at home, which makes the air compressor very useful for inflating all sorts of things. How to use the air pump STEP1: Start the car STEP2: Insert the power cord into the cigarette lighter port STEP3: Pre-set tire pressure value for digital display model STEP4: Install the inflation port on the tire valve STEP5: Press the air pump switch STEP6: Wait for the automatic shutdown, the inflation is completed.