Feature: 1. Cigarette lighter style, when in use, directly plug in into the cigarette lighter socket in the car, very convenient 2. 12-24V input voltage, can be used in cars, trucks, RVs, boats, buses, etc. 3. The thermometer can test the temperature of -10+80℃, and can detect the current temperature state in the car at any time. 4. The voltmeter can measure the voltage of 8-36V, pay attention to the voltage situation in the car at any time, deal with emergencies in time, and ensure driving safety. 5. Special high-efficiency IC design, exquisite materials, long service life, and ensuring safe use. Specification: Product model: CS-302 Product weight: 39g Product size: diameter 4cm/1.57", length: 7.5cm/2.95" Product material: ABS shell, environmental protection, smart IC chip Light color: Red+Blue, Red+Red (Optional) Input voltage: 12-24V Voltage measurement range: D.C 8-36V Temperature measurement range: -10+80℃ Installation method: when in use, directly plug in into the cigarette lighter socket in the car Note: There may be slight size deviations due to manual measurement, different measuring methods and tools. The picture may not reflect the actual color of the item because of different photographing light, angle and display monitor. Packages: 1 X Car Voltmeter Thermometer