Accurate and Fast Response: The air thermometer allows air to flow through the ventilation holes and takes measurements every 10 seconds. Temperature measurement range: -9.9~60°C / 14.2~140°F; Humidity measurement range: 10~95%RH. Temperature accuracy: ±1°C. Humidity accuracy: ±3~5%, more accurate and easy to use. Colorful Air Comfort Indicator: With a practical comfort level indicator, 9 moving arrows point to different colored icons depending on changes in humidity. This helps you adjust the moisturizing temperature of the humidifier to prevent colds, dry skin, asthma, allergies, mold, etc. Practical Clock and Calendar Function: The digital hygrometer can not only monitor indoor temperature and humidity, but also be used as a clock and calendar with 12-hour/24-hour switching and improved DD/MM European date format. (NOTE: No backlight and alarm function) Multiple Mounting Options: The hygrometer is available in various installation options: stand, magnet, and wall mounting with adhesive pad. Its size of 70*70mm and low weight are enough to save space and carry or install anywhere. Easy to Read with Large Digits: Thanks to the large LCD screen, the hygrometer displays large digits that are easy to read even from a distance. The °C/°F switch on the back gives you more freedom to choose the desired temperature in degrees Celsius or degrees Fahrenheit. Is the product not working as it should? Improved calibration function: When product placement or environmental factors affect data accuracy, you can calibrate the sensor for the most accurate humidity and temperature data. Show more