Features High Accuracy: The measurement accuracy of the detection module is high, and the accuracy is within the range of 50 ppm. CO2 Detection: The module enables intelligent adjustment of the indoor ventilation system based on CO2 concentration, which helps the air stay healthy. Mini Size: This CO2 detection module is compact, easy to install and practical, with a 2.54mm pitch pin connector for power supply and communication pins. Dual Use: This CO2 detection module can detect both temperature and humidity through built in sensors, making the module versatile. Large Measuring Range: The measurement range of CO2 detection module is 400‑2000ppm, which is practical. Specification: Item Type: Carbon Dioxide Monitor Sensor Module Material: PCB Supply Voltage Range: 2.4-5.5 V Measuring Range: 400-2000ppm Accuracy: ±50ppm Relative Humidity Measurement Range: 0-95%RH Typical Relative Humidity Accuracy: 6%RH Package List: 1 x Carbon Dioxide Monitor Sensor Module 1 x Pin Header Package List 1 x Carbon Dioxide Monitor Sensor Module 1 x Pin Header