What it is 9-in-1 indoor air quality tester that monitors temperature, humidity and carbon dioxide levels to help you maintain a safe, comfortable indoor environment. Key benefits — why you need it Detects poor ventilation and rising CO2 so you can act before occupants feel drowsy or uncomfortable. Tracks temperature and humidity alongside air contaminants so you can manage comfort and reduce conditions that encourage mold or dust mites. Provides reliable, up-to-date information to guide HVAC adjustments, window opening, or use of air purifiers. How it works Uses infrared and electrochemical sensors to measure air metrics and deliver real-time readings. Continuous updates let you see changes as they happen so you can respond quickly. One-button calibration lets you recalibrate sensors easily with a single press for consistent, trustworthy readings. Practical attributes Function: continuous monitoring of multiple indoor air parameters, including temperature, humidity and CO2. Performance: rapid, real-time updates made possible by infrared and electrochemical sensing technologies. Operation: simple one-button calibration for straightforward maintenance and dependable results. Compatibility: designed for indoor use across homes, offices, classrooms and similar spaces. Typical use scenarios Bedroom: monitor CO2 and humidity overnight to improve sleep comfort and ventilation strategies. Office or meeting room: track CO2 buildup during long meetings to know when to ventilate or adjust HVAC. Classroom or daycare: keep an eye on air quality during the day to maintain a healthier environment for occupants. Why it stands out Combines multiple air quality measurements in a single device with real-time feedback and easy calibration, so you get actionable information without complex setup. Specifications to note: 9-in-1 air quality tester; monitors temperature, humidity and carbon dioxide; uses infrared and electrochemical technologies; provides real-time updates; one-button calibration.