Description Features: Intelligent carbon dioxide value tester uses air semiconductor-sensor 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 anti-interference 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, suitable for office, family, and other occasions. 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. 5in1: The large screen displays the power, CO2 value, TVOC value, HCHO value, temperature and humidity. Note: The new machine needs to be ventilated for 24 hours to ensures accurately measurement,and the product will work normally. Specifications: Name: Air Quality Detector Battery: 1 * 3.7V, 2000mAh lithium battery (included) 5in1: CO2 Detection-Range: 400-5000 PPM, +50 +5%PPM CO2 Detection Sensitivity: 1PPM TVOC Detection-Range: 0-2.0 mg/m HCHO Detection-Range: 0-0.6 ma/m Temp Measurement-Range: -10 to 50 Temp Measurement Accuracy: 1 Humidity Measurement-Range: 0%-99%RH Humidity Measurement Accuracy: 2%RH Item Size: 90 * 70 * 40mm / 3.54 * 2.76 * 1.57in Package Size: 138 * 95 * 47mm / 5.43 * 3.74 * 1.85in Package Weight: 150g / 5.29ounce Packing List: 1 * Air Quality Detector 1 * Cable 1 * User Manual