Working voltage: DC 5.0~27V Frame size: 22x58 mm Installation opening size: 19.5x56 mm Temperature display range: -35 ~ 120 ℃ (error ±1 degree) Voltage display range: 5.0~28 V (error ±0.1V) Power lead length: 28CM Integrates time, internal and external temperature, and voltage into one display. Items can be shown individually or cycled automatically. Display content is customizable. Timekeeping uses Epson RX8025T chip for accurate time. Includes two temperature probes: one 0.3 meters and one 1.5 meters, both waterproof, with temperature measurement range of -35~120 degrees. Features brightness adjustment with 3 levels manually adjustable. Includes automatic brightness control that dims at night and brightens during the day. Material: ABS Color: Black Display screen color: Green Package Contents: 1 x Car Clock Note: Light reflection and differences in display devices may cause slight variations in the color of the item as pictured. Measurement error allowance is +/- 1-3 cm.