Digital Car Thermometer Product Page: https://goo.gl/TxAJJg The Digital Car Thermometer gauge accurately displays the temperature outside or inside of your car (one or the other). Teltek USA gauges are best in class and backed by over 20 years of design and manufacturing. Compatibility Any vehicle with 12vdc power Made in the USA and secured with a Lifetime Warranty Press button on gauge display to switch between Fahrenheit and Celsius Temp range: -99°F to 150°F (±1°F accuracy), Temp range Celsius: -76°C to 65°C (±0.5°C accuracy) 10' plug sensor cable for taking temperature reading (cable can be easily replaced if damaged) Requires 12vdc power Size 3" x 1 3/4" x 1 1/4" Easy installation instructions included. Mounting bracket included, or set in cubby, or velcro. Lifetime warranty, excluding abuse and the sensor cable When temp drops to 34° F the gauge will flash "ICE" then return to normal temp monitoring. The "ICE" warning will not flash again until the temp rises to 37° F and drops back down to 34° F.