Introducing the Gas Sensor Module - Enhance your environment with precise monitoring of CO2 levels, essential for maintaining optimal indoor air quality. Combining high accuracy with affordability Empower your indoor spaces with the sensor Module, ensuring long-lasting, efficient, and accurate air quality monitoring to promote health and well-being. 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. Reference accuracy, specified range 400-2000 ppm Power supply voltage range: 2.4-5.5 V High precision: ± (40 ppm+5%) Digital I2C interface Integrated temperature and humidity sensors Low power operation to Less than 0.4 mA average value @ 5 V, 1 measure/ 5 minutes 1. GND: Power negative input port 2. VDD: Power positive input port 3. SCL: I2C clock port 4. SDA: I2C data port Board size: 13.4 x 21.6mm- Compact yet highly effective, fit effortlessly in a wide variety of setups. Due to different batches, there may be differences in product appearance and printed text, which will not affect use Colour:As Shown Material:PCB Type: B:Gas sensor module purple board Package Contents: 2x Gas Sensor Module Detects kit Only the above package content, other products are not included. 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.