High-precision sensorThe portable carbon dioxide monitor uses the most advanced high-precision NDIR sensor technology to accurately and quickly detect carbon dioxide content. The indoor air quality monitor can perform hazard assessments. When the carbon dioxide in the air exceeds the set alarm value (alarm value: 1000 PPM), it will issue a warning to remind people to open windows or turn on air purifiers to maintain air balance and protect the health of you and your family.Portable carbon dioxide detectorThe carbon dioxide detector uses an easy-to-read LED display (adjustable brightness); the chassis adopts a link suspension design, combined with advanced NDIR sensing technology, the measurement is more accurate and easy to carry; built-in 2000mAh large-capacity battery, longer standby time; customizable carbon dioxide threshold and calibration function; built-in intelligent alarm setting and cancellation system, allowing you to live a healthier and more enjoyable life.The importance of air quality monitorCarbon dioxide, temperature and humidity constantly affect the ecological balance of humans or plants. The upgraded carbon dioxide detector can not only monitor carbon dioxide levels, but also monitor temperature and humidity in real time. Carbon dioxide concentration affects the breathing of humans (and other organisms), and if severe, it can endanger life. Therefore, we can keep our bodies healthy by monitoring the carbon dioxide concentration in the air.Wide ApplicationAir quality monitor is essential in many places. It is widely used in homes, schools, offices, cars, agricultural planting rooms, hotels, travel, camping, parties, factories, hospitals, supermarkets, libraries, etc. The 3-in-1 air quality monitor is the guardian of our health. (Note: Due to the different NDIR sensors used in the carbon dioxide meter, the allowable deviation is about 50ppm. Thank you for your understanding)Professional Products and ServicesOur air quality monitor package contains: 1 air quality monitor, 1 Micro USB charging cable, 1 product manual. (Please refer to the instruction manual before use)