AirFanta G2 meter measures CO2 levels, PM levels (includingPM1.0, PM2 and PM10), temperature, relative humidity in real-time, empowering you to make informed decisions for healthy ventilation and filtration. The color coding, prominent CO2 number, PM2.5 number and PM10 number on the display, and the color changes when the numbers reaches different ranges. And screen contents can be switched by pressing the power button. A free smartphone application for viewing and analyzing historical data from your indoor air quality meter, complete with user-friendly graphs. The application allows Tuya wifi smart socket to be automatically turned on and off based on the CO2 or PM number from the AirFanta G2. So a airpurifer that connected to a Tuya smart socket can be automated.AirFanta G2 carbon dioxide detectors use nondispersive infrared sensor (NDIR) technology for precise and reliable CO2 measurements. AirFanta G2 particulate sensor use optical sernsor technology for precise and reliable PM measurement. Apart from the number in μg/cubic meter, it can also show the PM numbers per Liter. A rechargable battery is built-in, and can be charged via a USB plug (not included in the package) and a cord (included in the package). The battery can last for around 2 hours usage. The screen can be set to automatically off via the application to extend the duration, and can be turned on again if waved closed to the screen.