①. Introducing the Gas Sensor Module - Enhance your environment with precise monitoring of CO2 levels, essential for maintaining optimal indoor air quality. Combining relatively high accuracy with affordability. ②. Empower your indoor spaces with the sensor Module, ensuring long-lasting, efficient, and accurate air quality monitoring to promote health and well-being. ③. Intelligent adjustment of indoor ventilation systems can be achieved based on carbon dioxide concentration, and indoor air quality helps to maintain a healthy environment under low carbon dioxide concentration for a period of time. ④. Reference accuracy, specified range 400-2000 ppm. ⑤. Power supply voltage range: 2.4-5.5 V. ⑥. High precision: (40 ppm+5%). ⑦. Digital I2C interface. ⑧. Integrated temperature and humidity sensors. ⑨. Low power operation to Less than 0.4 mA average value @ 5 V, 1 measure/ 5 minutes. ⑩. Interface definition: 1. GND: Power negative input port; 2. : Power positive input port; 3. SCL: I2C clock port; 4. SDA: I2C data port. ⑪. Board size: 13.4 x 21.6mm- Compact yet effective, fit effortlessly in a wide of setups. ⑫. Due to different batches, there may be differences in product appearance and printed text, which will not affect use. ⑬. Colour:As Shown. ⑭. Material:PCB. ⑮. Type: B: Gas sensor module blue board. ⑯. Package Contents: 1x Gas Sensor Module Detects kit. Only the above package content, other products are not included. ⑰. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.