LED Tire Pressure Alert

Under-inflated tires can cost you gas mileage, tire life, and even your life ... but how many of us remember to check them regularly? No need for reminders: you won't be able to miss the bright red flashing LEDs of these pressure monitor valve caps. The patent-pending system automatically calibrates itself to your tire's pressure (10-50 psi) and starts flashing if pressure drops by more than 4 psi. The completely self-contained units include a 2-year battery.

Features
Flashing LED alerts you to dangerous tire pressure loss.
Under-inflated tires can cost you gas mileage, tire life, and even your life.
The patent-pending system automatically calibrates itself to your tire's pressure (10-50 psi).
Starts flashing if pressure drops by more than 4 psi.
The completely self-contained units include a 2-year battery. Set of 4.