It is a quality air quality detector, using a superior electrochemical detection module, with high accuracy, stable performance, can accurately detect carbon dioxide value. Large screen design, you can see the measurement data clearly. Different colors display different air quality, green 400450ppm, blue 451700ppm,Purple 7011000ppm, yellow 10012000ppm, red 20015000ppm. You can have a try.FeaturesIntelligent carbon dioxide value tester uses air semiconductorsensor to monitor temperature and humidity of air quality.Adopts superior electrochemical detection module, with high accuracy, stable performance, can accurately detect carbon dioxide value.Strong antiinterference ability, low consumption and long service life.The product does not need calibration, it can be tested after booting, and it can accurately detect carbon dioxide.Different colors corresponding to different air quality, green 400450ppm, blue 451700ppm,Purple 7011000ppm, yellow 10012000ppm, red 20015000ppm.Hundreds of ventilation holes at the back of housing not only accelerate the convection between the air and the machine, thereby realizing effective detection, but also provide a fine heat dissipation effect.Widely applications agricultural planting, greenhouse vegetables, production warehouse, material processing, home interior, etc.There are 4 types for you to choose, you can choose 3in1 white, 3in1 black, 5in1 white, 5in1 black according to your demands.3in1The large screen displays the power, CO2 value, temperature and humidity.5in1The large screen displays the power, CO2 value, TVOC value, HCHO value, temperature and humidity.SpecificationsName Air Quality DetectorType 5IN1 black, 3IN1 black, 5IN1 white, 3IN1 white(optional)Battery 1 * 7V, 1200mAh lithium battery(included)Screen type 8 inches TFTLCDMaterial ABSScreen resolution 240 * 240Response time <1sTest temperature range 10 to 70Humidity test range 099%RHWorking voltage 5V/1A adapterMaximum power recharging current 600mARecharging USBItem size 72 * 96 * 36.5mm / 80 * 61 * 44inItem weight 126g / 44ouncePackage size 119 * 119 * 40mm / 69 * 69 * 57inPackage weight 163g / 75ouncePacking List1 * Air Quality Detector1 * Cable1 * User Manual