Indoor Air Quality Meter 5 In 1 PM2.5 HCHO Carbon Dioxide Detector CO2 New
HCHO Range: 0-1.999. 1 x Air Detector. CO2 Range: 0-5000. Easy To Use: This tester is very easy to use, wherever you want to test the air quality, just turn the tester on and put it in that place, then wait for the result.