12V 24V Car Auto Digital Led Electronic Time Clock + Thermometer + Voltmeter Three Colors For Choose Description: Length: 40.2mm， width = 12.8mm， thick ��7mmDisplay color: red， yellow， blueDisplay mode: 1.display time only 2.temperature display only 3.display only voltage 4. time temperature voltage alternating display (Note: alternate display mode， by dd option to choose whether to display the temperature or voltage， dd: 0 Status display time + temperature + voltage .dd: displaying a state time + voltage .dd : Displays the status of time + temperature 2)Note: Please inform us which display color you would like after you make an order， or we will ship the items to you by random， thank you!Features:1. Set the time， temperature， voltage， three functions in one2. manual error correction function with a temperature setting range -5 ~ 53. With backup battery， power-down time to continue to goElectrical Characteristics:1. Input voltage 5 ~ 30V. Note that to use a voltmeter function， the input voltage is at least more than 7V2. voltmeter range 7 ~ 30V， error �� 0.1V， the measured voltage is the input voltage. (Can also function as a wide range of uses voltmeter， power is more convenient， such as a pen so you can remember this power， and do not exceed the maximum voltage of 30V)3. Temperature measurement range -50 to 130 degrees， the temperature resolution of up to 0.1 degrees4. Working current of about 30MAPacking detail: 1pc