Too much or insufficient air pressure in car tires is an important cause of car accidents. Some older cars do not have real-time and accurate tire detection systems. Press the tires with your fingers. The local method of judging the strength of air pressure is even more troublesome and unscientific. With the following air pressure indicator valve, it will be much easier. The color change allows you to identify the air pressure status at a glance: black is the normal air pressure range; yellow means the air pressure is too high; red means the air pressure is low. With it, you don't have to worry about tire pressure.
