Measurement capabilities - The air quality meter uses semiconductor and infrared technology to measure air quality index, CO2, HCHO, TVOC, PM0.3, PM1.0, PM2.5, PM5.0, and PM10. It provides real-time data curves, particle value comparison, and data storage that can be imported into a computer. It also measures temperature and humidity with data storage. Power and charging - 18-in-1 air quality meter with a built-in 2000mAh battery, capable of continuous operation for up to 7 hours. Type-C charging port for easy charging via USB power supply. Display and readability - 2.8-inch HD screen for easy reading, displaying 13 data points in real time. Uses color coding to show air quality status for quick interpretation. Accuracy and sensitivity - Highly sensitive sensors deliver precise readings: CO2 at 1 ppm, TVOC at 0.01 mg/m³, HCHO at 0.01 mg/m³, and PM at 1 μg/m³. Use scenarios - Home use: monitor indoor air quality, optimize ventilation, and track changes over time. - Office or classroom: maintain healthy working or learning environments by tracking CO2, VOCs, and particulate matter. - After renovation or construction: check for formaldehyde and particulate emissions to ensure a safer indoor space. Note: All specifications align with the original model and function details, presenting a clear, professional, and trustworthy profile without added features.