Features: Indoor and outdoor temperature display,measuring range:Indoor:0-+50°C ,outdoor:-50°C -+70°C Icing alarm display will turn on as temperature lower -1°C-4°C 12/24 hour format display °C /°F temperature format display MAX. and MIN. temperature record Temperature tendency function Inspect and display real time automobile storage battery voltage. Alarm voice and lamp will turn on as voltage icon shows exorbitant or too low Orange and blue back light is shiftable Power: clock and in/out temperature:AG13(included) Backlight is powered by cigarette adaptor, suitable for both 12V/24V cars Outdoor sensor cable length is 1.5 meters Size: 13.5x3.5x2.5cm Specifications: Model Name: EA-CarClock-KT202_e1 Item Width: 3.5 inch Item Height: 2.5 inch Voltage: 12V/24V External Testing Certification: CE Item Type: Thermometers Item Length: 13.5 cm Indoor Range: 0-+50°C Outdoor Range: -50°C -+70°C Package Content: 1x Car In/Out thermometer clock voltage Monitor meter