Features: 2 in 1This car gauge has two function, including water thermometer and voltmeter. It can inspect your automobile at real time effectively. With AlarmWhen the water temperature is low and the voltage is too high or too low, there will be an alarm sound and digital flashing to remind you to check the vehicle. Design DetailsThe gauge is designed with dark blue dial, white pointer, yellow, three colors indication and digital display, for strong contrast, easy to read, and high measurement accuracy. With LightThe dial measures about 9.8x6.4cm/3.9x2.5inch and is equipped with blue backlight, making reading at night more convenient and getting the information more easily. Universal TypeUniversal gauge set is suitable for most of 12V/24V auto, such as, trucks, cars, construction vehicles, boats, motorcycles and more. Specifications: Material: Plastic Color: Black Size: (Approx)(LxW) 9.8x6.4cm/3.9x2.5inch Voltage: DC 12V/24V Package Included: 1 x Gauge (Water Temperature/Voltage Gauge) 1 x Temperature sensor (M10) 1 x Adhesive sheet 2 x Screws Note: 1. Due to the light and screen difference, the items color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.