9-in-1 Indoor Air Quality Tester — accurate, easy, and practical Key benefits Protects family health and comfort: continuous monitoring of indoor conditions helps you spot poor ventilation, high CO2, uncomfortable humidity, or temperature issues before they affect sleep, productivity, or wellbeing. Fast, reliable readings: advanced infrared and electrochemical detection provide real-time updates so you can respond immediately to changing room conditions. Simple operation for everyday use: clear display and one-key calibration make the device usable by non-technical users without complicated setup. What it does 9-in-1 indoor air quality tester with built-in sensors, including temperature, humidity and carbon dioxide measurements to assess your room climate and overall air quality. Real-time data updates using infrared and electrochemical detection technologies for timely, actionable information. One-key calibration: press the power button several times to perform quick calibration and maintain accurate readings without complex procedures. Large TFT full-colour screen shows power levels, temperature and humidity at a glance, making status checks fast and straightforward. Performance and usability Accurate sensing: combination of infrared and electrochemical sensors delivers dependable monitoring of CO2, temperature and humidity. Easy-to-read visual feedback: the full-colour TFT display presents key data clearly so you can understand conditions without menu navigation. Low-effort maintenance: one-key calibration streamlines accuracy checks, so the device stays reliable with minimal user intervention. Practical applications Home and nursery: monitor CO2, temperature and humidity to maintain safe, comfortable conditions for children and sleeping areas. Home office and shared workspaces: manage ventilation and thermal comfort to improve concentration and productivity. Classrooms and small meeting rooms: detect rising CO2 or poor ventilation and take corrective action to protect occupants and maintain alertness. What makes it stand out Focused on essential indoor parameters with a simple, fast user experience. Combination of infrared and electrochemical detection for responsive, dependable results. Large colour display and one-button calibration reduce the friction of regular use and maintenance. What to expect in daily use Place the monitor in the occupied area you want to assess. Readings update in real time on the large TFT screen. If accuracy checks are needed, press the power button several times to perform one-key calibration. Use the displayed temperature, humidity and CO2 information to adjust ventilation, heating/cooling, or humidification as needed. Specifications and functions (as provided) Device type: 9-in-1 indoor air quality tester Built-in sensors: measure temperature, humidity and carbon dioxide Detection technologies: infrared and electrochemical Calibration: one-key (press power button several times) Display: large TFT full-colour screen showing power levels, temperature and humidity This monitor is designed for straightforward, dependable indoor air quality assessment—delivering the critical information you need to keep indoor spaces healthy and comfortable.