The tire pressure gauge has a measurement range of 10-120 PSI. Simply place the nozzle on the valve and press firmly for 1 to 2 seconds. Remove the gauge from the valve and you can read the measured tire pressure. The correct tire pressure for the car can be found in various places: - In the car's instruction manual - On the inside of the fuel cap - On a sticker on the driver's door frame, on the sun visor, or in the glove compartment Regularly checking the vehicle's tire pressure is recommended because the correct pressure prevents unnecessary tire wear, provides better driving comfort, and is more economical in fuel consumption. Instructions for use: - Place the tip of the gauge on the tire valve - Press lightly for a good fit - Ensure you don't hear any noise from escaping air Tips: Measure pressure before driving. Always make sure to follow the manufacturer's instructions for tire pressure.