1. Perpetual calendar, clock function, 12/24 hour conversion, can be adjusted according to your needs.2. Temperature and humidity detection function: temperature range is -9.9℃~60℃(14.18˚F~140˚F), error ±1℃, accuracy 0.1℃, detection cycle 10seconds.Can be converted to Fahrenheit/Celsius.Humidity measurement range: 0%~99% RH, error ± 5% RH, accuracy 1%, detection cycle 10 seconds.3. Automatic color prompt for environmental climate: (1) .Drying: the humidity is less than 29%, (0% - 10%, 11% - 20%, 21% - 29%, three steps in total), display DRY (2) Comfortable: when the humidity is between 30% and 69% (30% - 39%, 40% - 60%, 61% - 69%, three steps in total), the COMFORT diagram (3) is displayed.Wet: when the humidity is greater than or equal to 70% - 99%, (70% - 79%, 80% - 89%, 90% - 99% in three steps), the 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 at the back can be hung anywhere in the desired position and can be used in offices, bedrooms, children's rooms, greenhouses, warehouses and cellars.