1. Measurement Object: The air quality meter utilizes semiconductor and infrared technology to measure the air quality index, CO2, HCHO, TVOC, PM5.0, PM0.3, PM1.0, PM2.5, PM10, data curve display, particle value comparison, data storage (exportable to a computer), as well as temperature and humidity monitoring and data storage. 2. TypeC Charging: This 18in1 air quality meter is equipped with a builtin 2000mAh battery, providing up to 7 hours of continuous operation. It features a TypeC charging port for convenient USB power supply charging. 3. 2.8Inch Screen for Easy Reading: Designed for home use, this air quality tester boasts a 2.8inch HD screen that displays 13 realtime data points, with colorcoded indicators for air quality status, ensuring effortless readability. 4. Accurate and Sensitive: The indoor air quality meter is fitted with sensitive sensors, delivering precise readings for CO2 (1ppm resolution), TVOC (0.01mg/m resolution), HCHO (0.01mg/m resolution), and PM (1g/m resolution).