It is an air quality detector that uses an excellent electrochemical detection module with high accuracy and stable performance, and can accurately detect carbon dioxide values. Large screen design, the measurement data is clear at a glance. Different colors represent different air qualities. You can try. Features: The smart carbon dioxide value tester uses air semiconductor sensors to monitor air quality temperature and humidity. Adopt superior electrochemical detection module, high accuracy, stable performance, can accurately detect carbon dioxide value. Strong anti-interference ability, low power consumption and long service life. The product does not need to be calibrated, it can be detected when it is turned on, and can accurately detect carbon dioxide. Different colors correspond to different air qualities, suitable for offices, homes and other occasions. There are hundreds of ventilation holes on the back of the casing, which can not only accelerate the convection between the air and the machine to achieve effective detection, but also provide good heat dissipation. Widely used: agricultural planting, greenhouse vegetables, production warehouses, material processing, home interior decoration, etc. Three in one: large screen display power, carbon dioxide value, temperature and humidity. 5in1: large screen display power, co2 value, tvoc value, hcho value, temperature and humidity. Specification: Name: Air Quality Detector Model: 5in1black, 3in1 black, 5in1 white, 3in1 white (optional) Battery: 1*3.7v, 2000mah lithium battery (included) 5in1: Co2-Scale detection: 100-5000ppm, +50 + 5% ppm Co2 detection Sensitivity: 1ppm Tvoc-Scale detection: 0-2.0 mg/m ⊃ 3; hcho-scale detection: 0-0.6 ma/m⊃ 3; Temperature measurement range: -10 to 50 °C A Temperature measurement accuracy: ± 1 ℃ Humidity measurement range: 0%-99% rh Humidity measurement accuracy: ±5% packing list: 1 * carbon dioxide detector 1 * USB data cable 1 * English User Manual