Car Digital Clock with LCD display Time and date display: Provides current time and date with 12/24 hour system conversion for easy reading on every trip. Temperature display: Measures ambient temperature in the vehicle and lets you switch between Celsius and Fahrenheit. Voltmeter display: Shows the car battery voltage so you can monitor charging and health at a glance. Power options: Powered by a car cigarette lighter charger or by 2 LR44 batteries (included) for backup use. Easy use: Simply plug into the cigarette lighter to activate and view all functions on a single LCD screen. Practical reliability: Combines essential time, environment, and battery information in one compact instrument. Use scenarios Daily drive: Keep track of time and date at a glance, monitor cabin temperature for comfort, and check the battery voltage before starting. Long road trips: View time, date, ambient temperature, and battery status during travel to anticipate and prevent inconveniences. Vehicle storage or idle periods: Use the included LR44 batteries to power the clock if the lighter socket is unavailable, ensuring the time and readings remain accessible.