Specification: Product name: 3 in 1 Car Clock Thermometer Voltmeter Material:PP Color: Red, Green, Blue Working voltage: DC 5.0 ~ 27V Frame size: 22 * 58 mm Installation opening size: 19.5 * 56 mm Temperature display range: -35 ~ 120 (error 1 degree) Voltage display range: 5.0 ~ 28 V (error 0.1V) Power lead length: 28CM Weight: about 30G Features: 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 Epson's 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