Specifications: Display Information: Time, Indoor Temperature, Humidity Dial Display: Digital Placement: Dashboard Origin: Mainland China Equipped with double-sided adhesive. Please clean the mounting surface before application. Position the solar panel toward a light source to enable continuous charging. Solar Clock Specifications: 1. Push the slide switch on the back of the product upward to turn on the power. 2. Slide the switch again to change the backlight color. 3. Insert a Type-C plug into the port on the side of the product to charge. Charging keeps the backlight continuously illuminated. 4. Time setting operation: A. Press UP/DOWN to switch between °C and °F. B. Press and hold the SET key for 3 seconds to enter time setting mode. Press SET to cycle through settings: hour → minute → year → month → date → confirm. C. While in setting mode, use the UP or DOWN keys to adjust values. 5. Press the SET key to switch between 12-hour and 24-hour time formats. 6. Press the O key to activate the key light for 5 seconds. 7. In low-light conditions, the backlight automatically turns on when the vehicle is in motion (solar model only). In bright light or daylight, the backlight automatically turns off. 8. Based on current conditions, the device displays icons indicating temperature (HOT, comfortable smiley, COOL) and humidity (DRY, comfortable smiley, WET). Special Note: For prolonged use in vehicles such as transport trucks, commercial vehicles, or taxis, a button battery may be required to supplement power when solar charging is insufficient. Package Includes: 1 x Car Clock Thermometer