This Mini Tire Pressure Gauge with easy-to-read LCD screen, is used to monitor your tyre pressure, thereby extending tire life, increasing fuel efficiency and ensuring your safety.It is suitable for measuring tire air pressure of cars, motorcycles,etc. LCD screen display with backlit for easy reading Three units available: PSI, KPA, BAR Small portable design, easy to hold and operate Accurate and quick measuring, reliable to use With anti-skid rubber handle Manual power on/off and auto power off for power saving LED light at gauge nozzle, convenient to use even at night The product does not contain batteries. If you receive the product, the product does not work and there is no battery inside, you need to buy 3*LR44 button batteries and install them before you can use them.