Indoor air pollutants mainly come from decorative materials, boards, paints, wall paints, glues, new furniture, adhesives and other pollutants that are easily harmful to human health. Therefore, it is necessary to have a quality air monitor for home. The air quality monitor provided by ATO Online Shop can detect variables based on models - dust (PM2.5/PM1.0/PM10), formaldehyde (HCHO), CO2, TVOC, AQI, temperature and humidity. PM2.5/HCHO/TVOC concentrations are the three major indicators of household air quality monitoring.