Features: Be suitable for all kinds of water temperature sensors , and display the temperature of the water for tank. Use moving-magnet principle to drive the needle, featuring good endurance and anti-vibration. LED light dispalay , knowing the oil level status real-time. The front cover is made of 316 stainless steel,It can be used for a long for time even in an acid-base or humid environment. Fine waterproof structure design, waterproof and dustproof. Specifications: Material:Metal Diameter: Approx.5.2cm or 2.04inch Color: Black Product voltage: 12V Use range: 40-120 or 100-250 Length of connecting line: 1.8m. Applicable models: construction machinery, mining machinery, generator sets, automobiles Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1x Water Temperature Gauge