General description 2 in 1 Voltmeter and Thermometer designed for vehicles such as cars, trucks, buses, and motorcycles. This digital monitor gauge tests battery voltage and displays temperature simultaneously, making it an essential tool for vehicle maintenance. Technical specifications Voltage Measurement: DC 12V and 24V Temperature Range: -10℃ to 80℃ Display: Dual LED screen (blue and red) with high brightness for clear visibility Installation No battery required; simply plug the device into the car cigarette lighter socket. Usage Simultaneously monitor vehicle temperature and battery voltage for efficient vehicle management. Other information Built-in fuse for safe usage. Includes an external and foldable temperature sensor.