- Displays time in 24 hour format with date and day of week, and can switch to other functions as needed. - No wiring required thanks to a self contained solar panel and power system. It uses a rechargeable solar battery plus a high temperature lithium battery, and is designed for fixed mounting with no wiring. - Mounting uses a transparent seamless double sided adhesive film that is high temperature resistant, strong in adhesion, surface friendly, and leaves no glue traces. The adhesive is removable and can be reused. - The digital LED display is clearly visible in both day and night. It features automatic brightness adjustment to stay readable, staying soft at night and reducing glare under direct sunlight. - A Micro USB charging port provides extended charging when solar energy is unavailable, such as during rain. It is compatible with standard Android charging cables. - Built in temperature probe helps reduce measurement errors to improve accuracy of environmental readings. Practical applications - In a car interior: mount on the dashboard or cabin wall to show time, date, and day of week with reliable solar powered operation and USB backup charging during prolonged cloudy days. - In a workshop or office: mount on a wall or near a window to keep track of time and date while benefiting from daylight charging and a clear LED display with automatic brightness. - In an RV, camper, or outdoor setup: place in living quarters to provide a solar powered clock with date and day information, supported by a USB charging option when solar is insufficient.