As tire pressure drops by approximately 4 psi, LED Smart Cap Version 2 activates blinking red light to notify users. Low tire pressure alert light remains blinking for as long as 600 hours to provide ample warning. Powered by single Li-Ion battery, Smart Cap automatically compensates for ambient temperature changes to prevent false alarms, and comes complete with anti-theft device. Since monitoring system is self-calibrating, same cap can be used on tires ranging from 10–70 psi.
This story is related to the following:Test and Measuring InstrumentsTire Pressure Monitoring Systems | Tire Pressure Gages