Good digital car inflators will display the inflation pressure on the meter, some new tire inflators will display this information on the LCD screen, and more traditional products will display the pressure through the dial indicator and needle gauge. The digital display will give you a more accurate reading, and an added benefit is that the inflation pressure can be seen clearly in low light if the screen is backlit.

Auto stop function means that you can set the desired tire pressure PSI value, and the car tire inflator will keep inflating until the desired pressure is reached. This is a very practical feature, because in this way, the on-board air pump will not overinflate the tires. You can walk away while the equipment is working, no need to keep an eye on the in-car inflator pump, and no need to worry about a tire burst.

Good tire hand-held air compressors are usually lightweight. They typically weigh between 2 and 6 pounds, while some smaller ones weigh less than 1 pound, such as the AP3 on-board air pump that holds the wind, only weighs about 0.6 pounds, and weight and carrying capacity are two things to consider, especially if you leave the device in the car.

This option is especially useful if you carry a portable in-car inflator with you on the road. If it's dark outside, a tire inflator with a built-in flashlight can make your job a lot easier. Not only can it illuminate your inflated tires, it can also alert passing motorists that you are stuck.