3 In 1 car digital auto thermometer voltmeter clock volt temperature monitor 12v outdoor indoor led orange/blue backlight We offer discount for large quantity. Welcome to contact with us3 in 1 Car Digital Auto Thermometer Voltmeter Clock Volt Temperature Monitor 12V Outdoor Indoor LED Orange/Blue BacklightOrange and blue backlight is shiftable.Inspect and display real time automobile storage battery voltageAlarm voice and lamp to remind you to checking the storage battery as the voltage is excessive or too lowNeed 1pc LR44 battery( no included )Usage: HouseholdModel Number: Car ThermometerStyle: Standing StationMax Measuring Temperature: 50 Celsius - 69 CelsiusDisplay Size: 1.9 Inches & UnderTheory: Temperature SensorDisplay Type: DigitalPower Type: ChargerSpecial Features: Clock / Voltage / thermometerdigital auto car thermometer car100% NewWeight: 173.4gColour: Blackmaterial: plasticSize: 13.4cm * 3.3cm * 2.5cm(Approx)indoor:0 Celsius-50 CelsiusTemperature display in Celsius or Fahrenheit12/24 hour format display.Icing alarm display will turn on as temperature lower -1 CelsiusMAX. and MIN. temperature record.outdoor: -20 Celsius-70 CelsiusPackage Content:1 * Car Digital Auto ThermometerOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.