This air thermometer measures airflow through the vent every 10 seconds. It has a temperature measurement range of -9.9~60℃ / 14.2~140℉ and a humidity measurement range of 10~95%RH. With a temperature accuracy of ±1°C and humidity accuracy of ±3~5%, it offers more precise and convenient use. Featuring a practical comfort level indicator, 9 movable arrows will point to different color icons based on humidity changes, helping you adjust your humidifier or dehumidifier to prevent colds, dry skin, asthma, allergies, and mold. This digital hygrometer not only monitors indoor temperature and humidity but also functions as a clock and calendar with 12-hour/24-hour switching and an upgraded DD/MM European date format. (Note: No backlight or alarm function). The humidity meter offers various mounting options: brackets, magnets, and adhesive pads for wall mounting.