precision sensor & 7 in 1multifunctional device: Our 7 In 1 Air Quality Monitor can accurately detect the current CO2 concentrationtemperatureTOVC,HCHO, PM2.5,PM10and humidity around you in real timemakes it easy to understand your indoor air condition. Measurment rangeCO2 measurement range: 370-9999PPMaccuracy3%of readings of 40PPM. Temperature measurement range: -20-603. Humidity measurement range: 0-99%RH5%.Particle mass concentration range (PM2.5 standard value) 0-1000mg/m.TVOCmeasuring range:0-2.000mg/m.HCHO measuring range0-1.000mg/m . 3.2 inch LCD HD display&Long-time stand byIt has a 3.2 inches LCD HD color screen, which can intuitively display the detected data. With the backlight, you can clearly understand the data you want to know even in the scene with poor lighting.It contains a rechargeable battery and can work continuously for more than 8 hours. Carbon dioxide detector can be widely used in agricultural planting, breeding, and industry, such as planting greenhouses to detect the amount of gas fertilizer applied, the ventilation status of livestock farms,beer.Not only that, in our daily life environment such as: kindergartens, schools, office buildings, shopping malls, supermarkets,stations, hospitals and other public places.