Backlit Display: A small light behind the screen, controlled by a button, allows you to easily check temperature and humidity even at night. Suction Cup & Rotating Design: This hygrometer thermometer features a suction cup and a 180-degree swivel axis, making it easy to place almost anywhere. Multiple Uses: This indoor hygrometer thermometer provides quick and easy readings of ambient temperature and humidity, perfect for reptile enclosures, offices, bedrooms, living rooms, incubators, greenhouses, and nurseries. Accurate Measurement & Fast Refresh: Temperature range: -20°C-60°C; Humidity range: 10%-99%RH (Measures conditions every 15 seconds). Temperature accuracy: ±1°C; Humidity accuracy: ±5%RH. Easy to Read & Use: Two buttons on the back control the backlight and °C /°F conversion. Powered by a CR2032 battery (included).