The solar luminous car clock provides essential timekeeping with flexible functions and simple, wire-free installation. - Display and function: Shows time (24-hour), date, and day of the week, with the ability to switch to other functions as needed. Keeps you informed at a glance. - Adhesive mounting: Uses a high-quality transparent seamless double‑sided adhesive film that withstands high temperatures. It will not damage surfaces or leave glue traces, and it can be used multiple times. - Easy, wire-free power: No wiring required. Powered by a high‑quality solar panel with a rechargeable solar battery power supply and a high‑temperature lithium battery power supply. Fixed in place with the adhesive for secure mounting. - Readability and brightness: The digital LED display is clearly visible in both day and night. It includes automatic brightness adjustment to be soft at night and readable in direct sunlight. - Backup charging and accuracy: A Micro USB charging port allows continued charging when solar energy is unavailable (for example on rainy days) and is compatible with standard Android charging cables. The built‑in temperature probe helps reduce measurement errors. 2-3 use scenarios - In a car cabin or dashboard: Mount the clock on the dash using the adhesive so you can easily read time, date, and day of the week without wiring. Auto brightness makes it legible in varying light conditions. - In a garage, workshop, or outdoor area: Place the clock on a wall or shelf where it can receive sunlight. Solar power keeps it running with no cables, while the adhesive keeps surface cleanup minimal and reversible. - In an RV, boat, or vehicle parked in sun: Position where sun exposure is available to maximize solar charging. Use the Micro USB port for backup charging when needed, and rely on the temperature sensor for improved measurement accuracy.