Features:- 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.- 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.- Car battery voltmeter.- Powered by car cigarette lighter charger or 2 x LR44 batteries (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.Specifications:- Voltage: DC 12 - 24V- Base Diameter: 4.5cm- Material: Plastic， glass- Power: 0.6W- Power cord length: Approx. 150cm- Temperature sensing line length: Approx. 200cm- Stand-by power: 2 x LR44 button cell (included)- Temperature measurement range: -10 - 50 degrees- Temperature display resolution: 1 degree- Temperature accuracy: Plus / minus 1 degree- Temperature measuring duration: 60 seconds Features: Portable， Quick reading Display Type: Digital LCD display Power Supply: Build-in battery Material : Plastic Color : Black 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 Package weight: 0.17 kg 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 Package size (L x W x H) : 9.5 x 7 x 6 cm / 3.73 x 2.75 x 2.36 inches Package contents: 1 x Car LCD Clock， 1 x Cigarette Lighter Charger， 1 x Sensor， 1 x Double-sided Adhesive Tape， 1 x Bilingual User Manual in English and Chinese