1.Accurate and quick update: temperature range: 50°C to 70°C (display LL.L °C below 50°C; display HH.H °C above 70°C), humidity range: 10% to 99% (display LL % below 10%; display HH % above 99%). Temperature Accuracy: ±1°C Humidity accuracy: ±35%, more accurate and easier to use. Suitable for indoor, bedroom, room, kitchen, greenhouse, guitar room, office and wine cellar 2.LARGE LCD DISPLAY, EASY TO READ With the large LCD screen, the hygrometer displays large numbers that you can easily read even from a distance. If product placement or environmental factors affect data accuracy, you can calibrate the sensor for the most accurate humidity and temperature data 3.Convenient Clock Calendar Function The digital hygrometer can not only monitor the indoor temperature and humidity, but also can be used as a clock and calendar with 12 hour/24 hour switch and date format. (Note: no backlight and alarm function) 4.COLOR AIR COMFORT INDICATOR With convenient comfort level indicator, a movable arrow points to a different color symbol depending on the change in moisture, helping you adjust the humidifier/dehumidifier hygrostat to prevent colds, dry skin, asthma, allergies, mold, etc