1. Working voltage: DC 5.0~27V 2. Frame size: 22x58 mm 3. Installation opening size: 19.5x56 mm 4. Temperature display range: -35 ~ 120 ℃ (error ±1 degree) 5. Voltage display range: 5.0~28 V (error ±0.1V) Power lead length: 28CM Integrate time, internal and external temperature, and voltage into one. An item can be displayed individually, or items can be displayed alternately in a cycle, and the items to be displayed can be customized. The time chip uses Epson's RX8025T chip, and the time is accurate. It comes standard with two temperature probes, two waterproof probes of 0.3 meters and 1.5 meters respectively, with a temperature measurement range of -35~120 degrees. With brightness adjustment function, 3 levels of brightness are adjustable. It also has an automatic brightness function that can darken at night and brighten during the day. Material:ABS colour:black Display screen color:Green Package Contents: 1 x Car Clock Only the above package content, other products are not included. Note: Light reflection 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.