Can be installed in various places. Solar powered: The thermometer works based on light , and can working with indoor light, such as lights, lamps or flashlights, etc. No batteries are required, which is environmentally friendly. [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. Wide range of uses: Solar thermometer is ideal for measuring temperature in indoor and outdoor environments such as home, , studio, pool spa. 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.