Jeasun Digital Car Voltmeter with Clock,Thermometer,Vehicle Battery Over-voltage/Low-voltage Alarm This fantasitic LCD display tells you about car battery voltage, clock time, in/out temperature. The car voltage meter has over-voltage/low-voltage alarm function, and icing alarm. Display temperature inside the vehicle and the outer, range from -50-70,Easy to convert 'C to 'F. Car clock time can be display in 12hr or 24hr,2 color choices of backlight. This vehicle voltmeter/clock/thermometer is clear and easy to read,low consumption and energy-saving,easy fixing.