Features: 1.This Car Voltage Meter Clock Thermometer is a multifunctional clock with 4 in 1 function, including time, thermometer, voltmeter and backlight. 2.Special function: Time display (12 / 24hour), date display, dual temperature display, alarm clock, snooze function, frost alarm function, automobile storage battery voltage indicator function, LED backlight. 3.Two colors blue / green of backlight for choice when the clock is powered by car cigarette lighter, there would be no backlight when it is powered by backup batteries. 4.Alert you to your car battery's voltage and its alarm sensor notifies you of excessive or under normal voltage operations. 5.When it connects with car, its back light is light up and all the contents (including the time, temperature and volt) will be displayed on the LCD screen Specification: Description:_x000D_ This Car Voltage Meter Clock Thermometer is a multifunctional clock with 4 in 1 function, including time, thermometer, voltmeter and backlight. It can inspect your automobile at real time effectively, there is alarm lamp to remind you to avoid icing may cause damage to your car as temperature lower freezing point. There are alarm voice and lamp to remind you to cheeking the storage battery as the voltage is excessive to too low. You can maintain your automobile by the real time data of voltage._x000D_ _x000D_ Features:_x000D_ _x000D_ Time / date display, 12 / 24 hour system conversion. _x000D_ Snooze function, snooze time: 5 minutes. _x000D_ Capable of switching temperature display unit Celsius / Fahrenheit degree. _x000D_ Pedestal 180-degree revolve. _x000D_ Car battery voltmeter. _x000D_ Powered by car cigarette lighter charger or 2 x LR44 batteries (included). _x000D_ Display accurate temperature readings in and outside of the car. _x000D_ Alert you to your car battery's voltage and its alarm sensor notifies you of excessive or under normal voltage operations. _x000D_ The LED backlight design allows you to accurately read the digits in the dark. _x000D_ Easy to install and use, a perfect accessory for your car. _x000D_ Also has the function of freeze alert. _x000D_ _x000D_ Specifications:_x000D_ Voltage: DC 12 - 24V_x000D_ Base Diameter: 4.5cm_x000D_ Material: Plastic, glass_x000D_ Power: 0.6W_x000D_ Power cord length: Approx. 150cm_x000D_ Temperature sensing line length: Approx. 200_x000D_ Stand-by power: 2 x LR44 button cell (included)_x000D_ Temperature measurement range: -10 - 50 degrees_x000D_ Temperature display resolution: 1 degree_x000D_ Temperature accuracy: Plus / minus 1 degree_x000D_ Temperature measuring duration: 60 seconds_x000D_ Features: Portable, Quick reading_x000D_ Display Type: Digital LCD display_x000D_ Power Supply: Build-in battery_x000D_ Material : Plastic_x000D_ Color : Black_x000D_ Package weight: 0.17 kg_x000D_ Product size (L x W x H) : 9.2 x 5.5 x 2.8 cm / 3.62 x 2.16 x 1.10 inches_x000D_ Package size (L x W x H) : 9.5 x 7 x 6 cm / 3.73 x 2.75 x 2.36 inches_x000D_ _x000D_ Package contents:_x000D_ 1 x Car LCD Clock_x000D_ 1 x Cigarette Lighter Charger_x000D_ 1 x Sensor_x000D_ 1 x Double-sided Adhesive Tape_x000D_ 1 x Bilingual User Manual in English and Chinese PackageList: