Screen with backlight: add a little light behind the screen, and you can control it with the button behind the thermometer, hygrometer, so even at night, if you want to check the temperature and humidity, it just turn on the screen and you can see it Suction cup and rotating design: this hygrometer thermometer adds a suction cup and a 180 degree rotating axis, and it is the appropriate size, you can place it just about anywhere you want. Multiple Uses: This indoor hygrometer thermometer allows you to easily and quickly know the environment temperature and humidity around you anywhere, plus of its backlit function. Perfect for use in reptiles, offices, bedrooms, living rooms, incubators, greenhouses and baby rooms Accurate measurement and quick updateTemperature measurement range: -20C to 60C; humidity measurement range: 10% to 99% RH (measures conditions every 15 seconds). Temperature measurement accuracy: 1C. Humidity measurement accuracy: 5% RH Easy to read and useThere are two buttons on the back of this digital thermometer, one is the backlight function button, and the other is the C/F conversion button, which is very easy to use, and powered by a CR2032 battery (included). Features: Temperature measurement range: -20C to 60C. Temperature measurement accuracy: 1 C. Temperature resolution: 0.1 C Humidity measurement range: 10% RH-99% RH. Humidity measurement accuracy: 5% RH Humidity resolution: 1% Food: 1 CR2032 battery (included) Backlight: Control the backlight through the light button behind the thermometer, press once to turn on the screen, press again to turn off the backlight, if you do not turn off the backlight manually, it will automatically turn off after 15 seconds. Contents: 1 hygrometer thermometer. Seuais