People are more and more caring for cars, and they are more and more knowledgeable about vehicle maintenance. Everyone will prepare some emergency vehicle maintenance tools on the car to make long-distance driving more at ease.

　　The basic parameters are roughly divided into several aspects: power, air output, additional functions.

　　There are single-cylinder and double-cylinder air pumps. This sounds a bit like the name of a car engine, but it's pretty much the same. Single-cylinder means that the tire pressure pump has only one power element inflating the tire, while dual-cylinder means that two power elements work at the same time.

　　So theoretically a two-cylinder is better. However, if the weight of some small cars is small and the tires are small, there is no problem at all with a single-cylinder inflator.

　　The air pump is divided into automatic and manual versions. As long as some pumps set the value that the tire pressure should reach, turn on the power, the air pump will automatically inflate the tire to the specified tire pressure and stop automatically. Of course, this type of inflator is also more expensive.

　　The inflator pump is used to inflate the car. Usually, when you can’t go to the auto repair shop in time, the environment you face may be more handheld automatic tire inflator.

　　Some air pumps will be carefully installed with lights to prevent night operation. And some tire pressure pumps also come with tools such as screwdrivers, pliers, etc., to give people many conveniences.