[Air comfort indicator] Temperature, humidity and environmental level icons. Divided into Dry/Comfortable/Wet three levels, it is a good helper to adjust temperature and humidity. When the temperature is 1826 and the humidity is 30%69%, the arrow automatically points to the green COMFORT icon. When the temperature is 1826 and the humidity is 30%69%, the arrow automatically points to the green COMFORT icon [2 Sensing Contacts & Quick Sensing] LIORQUE thermometer and hygrometer updates the reading every 10 seconds, keeping you up to date with the latest changes in temperature and humidity reading. (The temperature measurement range is -9~60) [Memory Function and Minimum/Maximum Recording] Digital Hygrometer can memorize the highest and lowest temperature and humidity in 24 hours. It is a good partner to take care of children and the elderly [High Accuracy & / Conversion] Indoor Thermometer can get fast and accurate time data when the airflow passes through the vent. And you can switch between Fahrenheit and Celsius [Longer Battery Life] LIORQUE indoor thermometer and hygrometer is powered by 2 AAA batteries (including batteries). It is very suitable for use in your nursery, greenhouse, office or wine cellar.