1. Perpetual calendar, clock function, 12/24 hour conversion, can be adjusted according to your needs.2. Temperature and humidity detection function: the temperature range is - 9.9 ~60 (14.18 F~140 F) , error 1 , accuracy 0.1 , detection cycle 10 seconds. It can be converted in Fahrenheit/Celsius. Humidity measurement range: 0%~99% RH, error 5% rh, accuracy 1%, detection cycle 10 seconds.3. Color automatic environmental climate prompt:(1) . Drying: humidity is less than 29%, (0% - 10%, 11% - 20%, 21% - 29%, three gears in total), DRY display(2) Comfortable: when the humidity is between 30% and 69% (30% - 39%, 40% - 60%, 61% - 69%, three gears in total), the COMFORT diagram is displayed(3) . Wet: when the humidity is greater than or equal to 70% - 99%, (70% - 79%, 80% - 89%, 90% - 99% in three gears), WET diagram will be displayed4. Backlight touch key: touch the button once to turn on the backlight and turn it off automatically after 15S.5. Two kinds of durable support/hanging holes can be fixed. The hanging hole on the back can be hung anywhere in the required position, and can be used in offices, bedrooms, baby rooms, greenhouses, warehouses, and wine cellars.