Dual-Scale Display:Features both Celsius (40–130°C) and Fahrenheit (110–265°F) scales on a single analog dial for versatile readability Features:100% brand new and never used.High sensitivity and easy operation, Equipped with Yellow LED backlighting for clear readings in low-light or nighttime conditions Read: 40-130℃/110-265℉,The diameter of the installation: 2 inch / 52mm, adds a retro aesthetic while monitoring coolant temperature accurately (Unit: degree Fahrenheit & degree Celsius) Works with most 12V vehicles; Sensor NPT 1/2-14 ; requires professional installation for optimal performance Power: 12V DC, Max. 0.3A,Thread size sensor:1/2-14 NPT,Length of the cable:1.8 meter