24 Jul 6 in 1 Air Quality Monitor PM CO2 Meter Carbon Dioxide Level TVOC HCHO Detector
TVOC: 0-9.999mg/m³. HCHO Detection range 0-9.999mg/m³. Backlit LCD screen: The CO2 tester has an LCD screen with a colour backlit display that makes each value easy to identify and read at a glance....