Yosoo 12V Car Digital Thermometer Voltmeter Clock Alarm Monitor, Multifunctional Auto Meter Clock Voltage Freezing Temperature Gauge, Clock LCD Monitor Battery Meter Detector LED Display (Green) Date/Hour Week/Second Display: Switch the display between 12-hour and 24-hour. Temperature measurement range: -10-70. Display of the car battery voltmeter. Alarm Clock: Snooze function with 5 minutes interval; Switch Temperature display between Celsius and Fahrenheit. Two backlight colors for choice when the clock is powered by car cigarette Lighter and there would be no backlight when it is powered by backup batteries.