The INFORMER XL Thermometers are a practical and reliable solution for monitoring temperature in your vehicle. With large super bright LEDs available in blue or red, the thermometer reads from negative 99 degrees to 150 degrees Fahrenheit. The self-dimming feature makes it easy to view at night, and the ice warning feature flashes and scrolls "ICE" when the temperature reaches 34 degrees Fahrenheit. Each thermometer includes a 10-foot plug-in sensor and fits most makes and models. Made in the USA, these thermometers are sold individually and provide a practical solution for temperature monitoring.