9-in-1 Air Quality Monitor Indoor Carbon Monoxide Detector PM2.5/1.0/10 HCHO
HCHO Detection Ranges: 0-0.6mg/m3. PM2.5 Detection Accuracy: 1ug/m3. PM2.5 Detection Ranges: 0-1000ug/m3. CO Concentrations Above 50PPM Trigger The Default Carbon Monoxide Alarm. The Alarm Frequency Increases As The Concentration Increases.