Features: 1.Two in One: Can not only read the vehicle voltage, but also read the water temperature, which is convenient and practical, and improves driving safety. 2.Easy to Read: The display adopts a wide screen, and the values and graphs are clear, which is convenient and quick to read, allowing you to understand at a glance. 3.Wide Applicability: Suitable for a variety of motor vehicles and trucks, the product voltage is DC 9V?36V, and the size of the water temperature plug is 10mm. 4.Rigorous Testing: All components are rigorously inspected and meet the strictest quality standards for stable performance and long service life. 5.Quick Installation: The installation is simple and quick, and you can enjoy the convenience and practicality brought by the product without much professional knowledge. Specification: Item Type: Car Voltmeter Gauge Material: Plastic + alloy Voltage: DC 9V-36V Water Temperature Plug Size: Approx. 10mm/0.39in