Description: This is a practical measuring car kit consists of voltmeter and thermometer. Mini size and high accuracy, with LCD digital display screen, temperature, voltage, clock, date all will be shown in this mini device. Features: Car Voltmeter + Thermometer 2 in 1 design, compact and portable. Precise voltmeter, accurately monitor and instant show the data of car battery voltage on the LCD screen. Thermometer Function, equipped with a 2 meters wired temperature sensor, measure the indoor and outdoor temperature with ± 1.0 ℃ high accuracy. Meanwhile, this unit can freely switch centigrade and Fahrenheit display. LCD digital highlight display screen, shows hours, minutes, indoor temperature, outdoor temperature and voltage simultaneously in the same screen, and provides 12 hour or 24 hour time display system conversion. Two LED backlight Mode: If this unit is supplied by the car cigarette lighter, backlight is light up and all the contents (including time, temperature, and voltage) will be displayed on the LCD screen. If it is supplied by the backup battery, there is no backlight and the LCD screen will display the time and temperature. Freeze-alert Function: When outdoor temperature is within -1 ℃ ~ 4 ℃ , the icon of Freeze-alert will flash continuously for 30 seconds. More user-friendly Functions: Calendar, alarm clock, snooze function, etc. With a stable stand holder, flexible and easy to adjust the angle to make it easy for you to see the screen clearly. Specifications: Color: Black Material: ABS Temp Display: ℃ / ℉ Temp Measuring Range: -50 ℃ ~70 ℃ Temp Measuring Accuracy: ± 1.0 ℃ Temp Sampling Duration: 3s Volt Measuring Range: DC 12 ~ 24V Battery: 2 pcs L1154F Batteries (Included.) Length of Power Supply Cable: Approx. 1.4m / 55.1in Length of Temp Sensor Cable: Approx. 2m / 78.7in Size: Approx. 15.5 * 4.6 * 2.1cm / 6.1 * 1.8 * 0.8in Package Weight: 148g Package List: 1 * 2 in 1 Car Voltmeter Thermometer 2 * Double-sided tape .