Dual display: can display automatic battery voltage and temperature inside the car at the same time (this is for Fahrenheit); input voltage is 12V or 24V, temperature test range is -12 to 160F. External temperature sensor: the car thermometer with external temperature sensor allows you to bend the sensor to avoid possible heating/direct sunlight, so you can get more accurate results.High quality movement make the product measurements more accurate. Safe to use: the volt temperature meter has a built-in fuse, which makes it safe to use and will not cause any damage to your car. Easy to read: the display is made of LED material, so it is easy and convenient to read even in dim light.LED display clear and bright at night. Set the LED to light up, cool down and glow, see more clearly at night. Specification: Type: Blue Material: Plastic case Temperature sensor screw diameter: 10mm For car or trunk 12V/24V Power supplies: DC current 9V - 36V Size: 72 * 65 * 65mm / 2.8 * 2.6 * 2.6in Weight: 129g / 4.6 oz. Packing size: 105 * 80 * 70mm / 4.1 * 3.1 * 2.8in Package weight: 175g / 6.2 oz. Package list: 1 * Car 2 in 1 Indicator with Sensor. 1 * Bracket 1 * Gold Key Ring 1 * Mounting screw Accessories Red---Power supply+(Red Black)---Power supply-(Red Black)---Power supply Application: Suitable for universal 12V and 24V car. Water temperature measuring range -10 C-110 C. Features: With digital display, intuitive observation 2. 2. Accuracy and stability of parameter display, low power consumption. 3. Easy installation, stable performance, anti-vibration and anti-shock. 4. When the alarm is displayed, the alarm will flash.