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