9 in 1 multifunctional air quality detector with automatic monitoring and no startup calibration required Monitors CO2 concentration, CO concentration, TVOC value, HCHO value, PM2.5/PM10 value, temperature and relative humidity 2000 mAh capacity rechargeable battery with low power consumption for long endurance; no frequent replacement needed Sensor technology includes an air semiconductor sensor, PM2.5 sensor and electrochemical sensor backed by a performance chip; detection is more accurate and accuracy can reach 1 ppm Benefits and applications Provides automatic, reliable air quality monitoring to support healthier indoor environments without manual calibration Delivers comprehensive data for CO2, CO, TVOC, HCHO, PM2.5/PM10, temperature and humidity in a single device Reduces maintenance with long battery life and rechargeable power Suitable for Office, school, warehouse, agricultural plantings, and other settings that require real time air quality monitoring Use scenarios In an office or classroom to monitor CO2 levels for comfortable occupancy and productivity In a warehouse or workshop to track gas concentrations and particulate matter for safety and compliance In greenhouses or farming environments to monitor CO2 enrichment, temperature and humidity to support plant growth