About this item Function Digital AUTO Gauge water temperature gauge (Fahrenheit ℉), voltage. Water temp indicating range: 14℉-248℉ Fahrenheit, Temperature warning range: 203℉-248℉; Power Supply Voltage Range: DC 9V-36V, Default Alarm Value: >30V, <10V. When the alarm that is displayed flashing alarm. 30V, High Quality Water Temperature Fahrenheit and Voltmeter Gauge Kit is made of high quality ABS material, with Led digital display. Stable performance, anti vibration and anti bump. Easy to install The water temp, volt meter can be installed on most 12-24V AUTO vehicles. Connect the black red wires to the positive electrode and the red wires to the negative electrode. The water temp and volt gauge have anti-reverse connection protection, so even if you accidentally connect the wrong circuit, the digital water temp gauge for car will work properly. Package Includes 2 in 1 Water temp and Volt Gauge, 1/8″NPT Temperature Sensor, Wiring Harness, Double-sided adhesive non-slip pad, Mounting Hardware and Instruction. High Cost Performance : MAIMIEMI 2 in 1 auto gauge set combines the functions of voltmeter and water temperature gauge. Without purchasing another gauge, the 2 in 1 auto Gauge can meet your needs at the same time, so that you can check the data at the same time and improve your driving experience.