We all know that air is an indispensable part of our lives. air quality affects our body and mind, but air is colorless and tasteless, we cannot measure it with our eyes.At this time we need an air tester to help monitor the air quality.Features:Large lcd screendifferent font colors show different air quality.Green400-799ppmYellow800-1199ppmOrange1200-1599ppmRed1600-1999ppm2000ppm above four colors flash at the same time.Size and easy to carry1200mah large capacity battery for a long time working time type-c charging interface easy chargingEasy to usingThe ventilation holes at the rear not only accelerate the convection between the air and the machine to achieve effective detection, but also provide a fine heat dissipation effect. The product does not need calibration boot can be tested for accurate detection of carbon dioxide used in greenhouses.ApplicationWidely used and practical for epidemic prevention, and control to detect the concentration of co2 in the population, in order to control the number of people and avoid the risk of cross-infection. Or family of agricultural production warehouse laboratories, etc.Specifications:Color: black white (optional)Co2 measurement range: 400-5000ppm Temperature measurement range: 0-50 celsius humidityMeasurement range: 0% -99% rhBattery: 3.7v 1200mahItem size: 90 * 70 * 35mm / 3.5 * 2.8 * 1.4inItem weight: 117g / 4.1ouncePackage Information:Package size: 140 * 125 x 41mm / 5.5 * 4.9 * 1.6inPackage Weight: 173g / 6.1ouncePacking list:1 * air quality analyzer1 * usb cable1 * user manual