Features:LED panel digital display, reading in seconds, more intuitive, quick and convenient.Time / date display, 12 / 24 hour system conversion.Snooze function, snooze time: 5 minutes.Capable of switching temperature display unit Celsius / Fahrenheit degree.Pedestal 180-degree revolve.Car battery voltmeter.Powered by car cigarette lighter charger or 2 x LR44 batteries (NOT included).Display accurate temperature readings in and outside of the car.Alert you to your car battery's voltage and its alarm sensor notifies you of excessive or under normal voltage operations.The LED backlight design allows you to accurately read the digits in the dark.Easy to install and use, a perfect accessory for your car.Also has the function of freeze alert.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.Two colors of Backlight for choices.If the power is supplied by the car cigarette lighter when plugged,backlight is light up and all the contents(including the time,temperature and volt)will be displayed on the LCD screen.If the power is supplied by the backup battery when unplugged,there is no backlight and LCD screen will display thetime,outdoor &.indoor temp.Car battery voltmeter(DC 12V-24VSpecifications:Voltage: DC 12 - 24VBase Diameter: 4.5cmMaterial: Plastic, glassPower: 0.6WPower cord length: Approx. 150cmTemperature sensing line length: Approx. 200cmDisplay Type: Digital LCD displayStand-by power: 2 x LR44 button cell (included)Temperature measurement range: -10 - 50 degreesTemperature display resolution: 1 degreeTemperature accuracy: Plus / minus 1 degreeTemperature measuring duration: 60 secondsSpecial function : Time display (12 / 24hour), date display, dual temperature display, alarm clock, snooze function, frost alarm function, automobile storage battery voltage indicator function, LED backlightBacklight Color:orange/ blue(there would be no backlight when it is powered by batteries.)Package Included:1 x Manual1 x Digital Clock Set Do dropshipping ?Yes,we do.If you have any question please contact us. Production Material Safety? All products are 100% brand new, workable and checked carefully before sending out. When is the parcel sent? We will send out order within 5 workdays. The delivery time will vary according to different countries and will be affected by weather, public holidays and so on. If order doesn't received in declare time, please contact us. How about refund?Full refund if the item does not match the description or defective.If there are any other problems , Click on Help Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.