3 Noticeable Colors,Easy to view,Save worry and Safe
Visually alerts you when the tire pressure is low to help avoid premature tire wear or blowouts from under-inflated tires.
Green/yellow/red system indicate level of proper tire inflation.According the recognize color to display the pressure of the tire.
Green shows that tire pressure is normal.
Yellow shows that the pressure is 10% lower than standard about 5 pounds.
Red alerts you that the pressure is 25% lower than standard at least 10 pounds.