What is an air pump? The air pump is a tool used to inflate the tires of a car. Connect the air pump to the tire's inflation port and turn on the air pump switch to inflate the tires. In the past, most of the electrical appliances connected to the car were connected to the battery of the vehicle. Nowadays, the electrical appliances can be connected to the power interface under the center console or in the armrest box, which is very convenient. When purchasing, you should choose a device that can be used for both the cigarette lighter interface and the battery clamp.