ITEM NAME:CCS811 Carbon Monoxide CO VOCS Gas Sensors Air Quality Gas Sensor Numerical C3A5 CJMCU CCS811-811 air quality monitoring Digital Internal gas sensor the CJMCU-811 is an ultra-low-power digital gas sensor that integrates a sensor and a CCS801-bit MCU with an analog-digital converter (ADC) for detecting indoor air quality, including carbon monoxide (CO) and a wide range of Volatile Organic compounds (VOCs). air quality sensor CCS811 characteristics: Ultra-low power consumption can be used in battery.Air quality sensor CCS811 characteristics CJMCU CCS811-811 air quality monitoring Digital Internal gas sensor. the main characteristics of the air quality sensor CJMCU-811 adc built in for sensor readings and digitized conversions.