It is an AQI sensor developed by our company, which can detect temperature, humidity, PM2.5, PM10, atmospheric pressure, light, TVOC in the air environment, CO2, formaldehyde, O3, CO, CH4, O2, SO2, NO2, H2, H2S, NH3, and many other elements, basically covering various indicators reflecting air quality. This 11 in 1 multifunctional air quality monitor can be used indoors or outdoors.