- Multifunctional Display: This device shows the current time, date, and both indoor and outdoor temperatures simultaneously. Easily switch between Celsius and Fahrenheit, and choose between 12-hour and 24-hour formats. - Battery Voltage Monitoring: Stay informed about your car's battery status with real-time voltage alerts. The built-in alarm sensor will notify you of overvoltage or normal undervoltage conditions, helping you prevent potential battery issues. - Adjustable and Comfortable Viewing: The voltmeter base features a digital thermometer that can be adjusted up to 180 degrees for optimal viewing angles. The large LCD display ensures easy reading, providing a clear visual experience, day or night. - Power Options: This device can be powered either through a car charger or by using two LR44 batteries (included), ensuring flexibility and convenience in power supply. - Practical Applications: Use this device in your car to monitor battery health during long trips, ensuring you never get stranded due to battery failure. It's also perfect for checking indoor temperatures before starting your vehicle, and for keeping track of the weather outside as you drive. - Compatibility and Performance: Designed for easy installation and compatibility with most vehicles, this product combines functionality with user-friendly features to enhance your driving experience.