Uses infrared semiconductor sensors, with high precision and stable performance, can accurately detect the carbon dioxide value.Adopts air convection design, which can provide more accurate detection results, and the detection range is 400 ppm-5000 ppm.4-color circle design, different colors corresponding to different air quality, suitable for office, family and other occasions.Widely applications: agricultural planting, greenhouse vegetables, production warehouse, material processing, home interior, etc.Sensing technology: infrared sensing technologyApplicable temperature: 1-70CDisplay mode: LED digital display + LCD screen + backlightDetection range: 400-5000 ppmColor box specification: 170*110*70mmWorking voltage: 5VSensor: infrared sensorBattery capacity: 2000HMACharging interface: TYPE-C5VProduct size: 137/112*80*35mmProduct net weight: 0.165kgProduct gross weight: about 0.273kgCoz instructions:0-999PPM: Green flash1000-1999PPM: Yellow flash2000-2999PPM: Orange flash3000-3999PPM: Red flashFour color flashes above 4000PPMDelivery quantity: 1 piece,"