Indoor air quality monitor :CO2 monitor , indoor air quality including CO2,VOC temperature ,humudity Wall Mount ( Indoor air quality monitor and controller ) ModelVAT920-CO2 VAT920-CO2-VOC ... -40—70degree,0 --95%Size135*91*36mmWall Mount ( Indoor air quality monitor ) ModelVAT820-CO2VAT820-CO2-VOCOperatingTouch screenDisplayColorTFT LCD ,size:50X65 mmMeasuring rangeTemperature ...