the CJMCU-811 is an ultra-low-power digital sensor that integrates a sensor and a CCS801-bit MCU with an analog-digital converter () for detecting indoor air quality, including carbon monoxide (CO) and a wide range of Volatile compounds (VOCs). Ultra-low power consumption can be used in battery powered equipment high sensitivity, fast heating Intelligent algorithm calculates TVOC / eCO2 values I2C signal output, direct communication with the main system Colour:As shown :PC+Metal Package Contents: 1 x Sensor Module 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.