Real-time measurement: The air quality monitor can accurately detect the levels of carbon dioxide (CO2), volatile organic compounds (TVOC), formaldehyde (HCHO), temperature and humidity, and update the measurement results every second on the color display. Accurate results: Using high-precision infrared sensors and built-in high-performance chips, it can accurately capture the weak current generated during the electrochemical reaction and calculate the carbon dioxide measurement results. Smart alarm: There are three levels of air quality, the indicator light will turn yellow or red, and you can see the color clearly on the big screen. 1200mAh built-in lithium battery: It takes 2.5 hours to charge, and it can last for 6 to 8 hours when fully charged, and it can be connected to a power source when in use. Wide application: The device is very suitable for air quality monitoring in canteens, restaurants, schools, offices, greenhouses, factories, hotels, hospitals and other places., Manufacturer: XZXXZSZ