Description Feature: 1. Real-time Display: Stay informed with real-time display of time, interior and exterior temperature, and voltage. Accurate readings and easy-to-read interface make it convenient to monitor essential information at a glance. Supports 12/24-hour format conversion and / switching. 2. High Sensitivity Sensor: Equipped with a high sensitivity sensor, the monitor can be extended outside the car by opening the car\u0027s A-pillar rubber strip. Attach it to the exterior side of the A-pillar to measure the outside temperature. Alternatively, stick it on the front windshield to measure the outside temperature. 3. Built-in Alarm Clock: Never miss important events with the built-in alarm clock function. Set reminders for specific times such as waking up, leaving, or attending meetings, ensuring you stay on schedule. 4. Built-in Battery: The monitor features 2 * built-in button battery that continues to power the clock even after the car is turned off. Say goodbye to time resetting and repeated settings. 5. LED Backlight with 2 Color Options: When powered by the car\u0027s power supply, the monitor displays all information with a backlight. When powered by the backup battery, it displays only the time without backlight. Choose between two colors for the LED backlight. 6. Compact and Non-obstructive: With its small size, the monitor does not occupy much space and does not obstruct your line of sight. Suitable for use in car, truck, SUV, RV, and more, it perfectly integrates into your vehicle without compromising visibility. Specification: Specifications: Product Color: Black Backlight Color: Blue and Orange / Green and Orange(optional) Material: Plastics Display: LCD Screen Working Voltage: 12 V Temperature Measurement Ranges: -50~70 Battery: 2 * G13 Button Battery(1.5V/125mAh) Cable Length: 1.5m/ 4.9ft Item Size: 92 * 55 * 75mm/ 3.6 * 2.2 * 3.0in Package Size: 110 * 90 * 55mm/ 4.3 * 3.5 * 2.2in Package Weight: 160g/ 5.6oz . Package List: 1 * Car Clock Thermometer Voltmeter 1 * Manual