Air Quality Monitor 3 in 1 CO2 Carbon Dioxide Detector E-ink Screen Tester

Style Carbon Dioxide Detector. Collection TypeCarbon dioxide(CO2 ), temperature and humidity. CO2 Detection Range400 ppm-5000 ppm. LED InstructionGreen LED: CO2 ≤ 800 ppm. Yellow LED: 800 ppm < CO2 ≤ 1500 ppm, Red.

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