9-in-1 Multifunctional Air Monitor. This indoor air quality tester has built-in sensors that measure temperature, humidity and carbon dioxide levels, helping create and maintain a healthy living environment for you and your family. Real-time Data Updates. Equipped with infrared and electrochemical detection technologies, it provides real-time air quality updates so you are informed about your room atmosphere at all times. Easy Calibration. One-key calibration function lets you calibrate sensor data by simply pressing the power button several times, giving accurate readings without complex procedures. Large Display for Easy Reading. The monitor features a large TFT full color screen that clearly displays power levels, temperature and humidity to quickly and easily understand indoor air quality. Practical Use Scenarios. Ideal for home, office or dorm rooms; monitor CO2 levels for ventilation needs, track humidity to prevent condensation and mold, and check air quality while cooking or using cleaners.