Specification:Product name: 3 in 1 Car Clock Thermometer VoltmeterMaterial:PPColor: Red/Green/Blue(depends your choise)Working voltage: DC 5.0 ~ 27VFrame size: 22 * 58 mmInstallation opening size: 19.5 * 56 mmTemperature display range: -35 ~ 120 ℃ (error ± 1 degree)Voltage display range: 5.0 ~ 28 V (error ± 0.1V)Power lead length: 28CMWeight: about 30GFeatures:1. Set time, temperature inside and outside, voltage as one. Can display an item individually, or alternately display each item, and supports customizing the items to be displayed.2. The time chip uses RX8025T chip, and the time is accurate.3. Two temperature probes are equipped as standard, two waterproof probes are 0.3m + 1.5m, the temperature range is -35 ~ 120 degrees.4. With brightness adjustment function, 3 levels of brightness can be adjusted. And has automatic brightness function, can achieve darken at night, brighten during the day.Package included:1PC 3in1 Car Clock Thermometer Voltmeter