This car tire pump has 4 unit values to choose from (Psi, Bar, Kpa, Kg/Cm), you just need to connect the hose to the tire to monitor the tire pressure. The maximum inflation pressure is 150PSI, which allows you to inflate your tires more easily. The small car compressor has a built-in 4000mAh battery, which can be charged quickly via the Type-C interface. When the battery is fully charged, it can charge 2.5 car tires (195/55R15) / 10 motorcycle tires / 7 road bike tires (700x28c) / 50 basketballs. tire pressure. When the preset pressure value is reached, the air pump automatically stops and cuts off the power to avoid the hidden danger of too high or too low tire pressure. predefined tires in an instant. Four fixed pressure values are predefined for cars, bicycles, motorcycles and balloons. Even if you are a beginner, you can easily use it to inflate your tires. Compared with traditional air pumps, this compressor is smaller, lighter and more convenient to carry. Contains 4 different accessories, it is the best choice for inflatable products! Equipped with LED lights allows you to work freely at night and respond to emergencies easily!