[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 detection contacts and quick detection] The thermometer and LIORQUE hygrometer update 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 record] Digital Hygrometer can memorize the highest and lowest temperature and humidity by 24 hours. It is a good partner to take care of children and the elderly [High precision and / conversion] Indoor thermometer can get fast and accurate data in time 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