Can be installed in various places. Solar powered: The thermometer works based on light energy, and can start working with indoor light, such as lights, lamps or flashlights, etc. No batteries are required, which is environmentally friendly. Wide range of uses: Solar thermometer is ideal for measuring temperature in indoor and outdoor environments such as home, office, studio, pool spa. [Easy-to-read thermometer and hygrometer] A small body with a clear and easy-to-read layout of temperature and humidity. Perfect for any interior. Large screen: LCD screen digitally displays temperature, ultra-wide viewing angle, the screen content can be clearly seen at any angle, easy to read. One-touch switch between Celsius and Fahrenheit.