This car tire inflator has 4 unit values to choose from (Psi, Bar, Kpa, Kg/Cm), you only need to connect the hose to the tire to monitor the tire pressure. The maximum inflation pressure is 150PSI, allowing you to inflate your tires more easily. The mini car compressor has a built-in 4000mAh lithium battery, which can be quickly charged through the Type-C interface. After the battery is fully charged, can charge 2.5 car tires (195/55R15) / 10 motorcycle tires / 7 road bike tires (700x28c) / 50 basketballs. The electric air pump has a tire pressure preset function. When reaches the preset pressure value, the air pump will automatically stop and cut off the power to avoid the hidden danger of too high or too low tire pressure.Large LCD display, real-time tire pressure and preset tire pressure at a glance. Four fixed pressure values are preset for cars, bicycles, motorcycles and balls. Even if you are a beginner, you can easily use it to inflate your tires.Compared with traditional air