Description:  It is a high quality air quality tester with superior electrochemical detection module for high accuracy and stable performance to accurately detect CO2 values. The large screen design allows measurement data to be seen at a glance. Different colours represent different air qualities.     Features:  The intelligent CO2 value tester uses an air semiconductor sensor to monitor the temperature and humidity of the air quality.  Highly accurate and stable performance with superior electrochemical detection module for accurate detection of CO2 values.  Strong anti-interference capability, low power consumption and long service life.  The product does not require calibration and can be switched on to detect carbon dioxide accurately.  Different colors correspond to different air quality, suitable for office, home and other occasions.  Hundreds of ventilation holes on the back of the housing not only accelerate the convection between the air and the machine for effective detection, but also provide good heat dissipation.  Widely used in: agricultural cultivation, greenhouse vegetables, production warehouses, material processing, home interiors, etc.     Specifications:  Name: Air quality monitor;  Battery: 1*3.7V, 1200mAh lithium battery (included);  6in1:  PM2.5 Detection range: 0-999 ug/m³;  CO2 detection range: 0-5000 PPM, +50 +5%PPM;  CO2 detection sensitivity: 1PPM;  TVOC detection range: 0-9999 ug/m³;  HCHO detection range: 0-9999 ug/m³;  Temperature measurement range: 0 to 70 °C;  Temperature measurement accuracy: ±1 °C;  Humidity measurement range: 0% - 99%RH;  Humidity measurement accuracy: ±2%RH;  Product size: 90 x 70 x 40mm;  Package size: 140 x 127 x 42mm;  Package weight: 300g;  Material: ABS.     Package included:  1 x Air quality monitor;  1 x USB Cable;  1 x User Manual.