【Multifunction】Synchronously display the car battery voltage, time/date and temperature inside and outside the car and can switch the temperature display unit degree/Fahrenheit; 12/24 hour system conversion. 【Easy to Use】 Convenient to read with large LCD screen, provides a clear viewing experience. 【Comfortable Viewing】 The digital thermometer voltmeter monitor stand can be adjusted 180 degrees, easy to see. 【Easy to Install】 The voltmeter monitor has enough cable length for easy installation. Overall dimensions: 9.3cm long, 6.8cm high (measured with the base), 2.5cm thick, base diameter 4.5cm. Note: The data are all manually measured, please allow an error of 1-3cm due to differences in light and display, there may be some color differences, please refer to the actual item received.