- Detection parameters: multifunctional air quality monitor that can monitor PM2.5, PM10, HCHO, CO, CO2. - Excellent sensors: uses an intelligent air semiconductor sensor for sensitive, accurate and stable measurement. - Color LCD screen: digital color LCD screen for easy recognition and reading; hollow design on the back for fast heat dissipation. - Multiple functions: built-in multiple sensors with infrared detection technology, real-time data update and one-key calibration function. Quick calibration by pressing the power switch three or six times. Use scenarios - At home during renovation or when new furniture is added, to monitor PM2.5, PM10 and HCHO levels and ensure air safety. - In an office or classroom, to track CO2 levels and maintain a healthy indoor environment with real-time updates. - In workshops, garages, kitchens, or during painting or solvent use, to detect CO and other pollutants and support safe air quality decisions.