It displays both Fahrenheit and Celsius. Classic and minimalist styling. Used to measure the water temperature of an automobile. High sensitivity and easy operation. Adds a vintage look and feel to your ride, high quality and lightweight. Fitment: For all 12V car models. Universal fit for most 12V vehicles. SPECIFICATIONS: Mounting Diameter: 2 inches (52mm) Max Diameter: 2.2 inches (57mm) Sensor Port Thread Size: NPT 1/2, NPT 1/4, NPT 3/8 Unit: degree Fahrenheit & degree Celsius Display Range: 130-280F & 50-140C Working Voltage: DC 10-15V (12V) Wire Length: 1.8 meters Note: Installation guide not included. Professional installation is recommended. Please verify compatibility to ensure the item meets your requirements. Product design may vary slightly between batches, including minor color or appearance differences, which do not affect functionality. Color: Material: Plastic Package Contents: 1 x Water Temperature Gauge Note: Light reflection and screen display differences may cause slight color variation between the image and the actual item. Measurement error allowance: +/- 1-3 cm.