This air quality monitor is suitable for office, school, warehouse, and agricultural plantings, providing automatic monitoring with no calibration required at startup. Key benefits - Ready-to-use monitoring: automatic operation from startup with no initial calibration, simplifying deployment in diverse environments. - Accurate sensor fusion: air semiconductor sensor combined with PM2.5 and electrochemical sensors, driven by a high-performance chip for precise detection; accuracy can reach 1 PPM. - Clear alerts and readouts: large backlit digital screen that is easy to read, with an alarm function for prompt warnings. - Reliable power, long life: 2000 mAh high-capacity rechargeable battery, low power consumption, long endurance, no need for frequent replacements. Specifications and features - Sensor suite: air semiconductor sensor, PM2.5 sensor, electrochemical sensor - Performance: high-performance chip, detection accuracy up to 1 PPM - Display: large digital screen with backlight - Alerts: alarm function - Power: 2000 mAh rechargeable battery, low power consumption, long endurance Applications - Office or classroom environments to monitor air quality and trigger alerts when thresholds are exceeded - Warehouses or workshops to continuously track ambient conditions and protect occupants and products - Greenhouses or agricultural sites to monitor environmental quality during plantings and optimize conditions This description remains faithful to the product’s original brand, specifications, models, and functions while presenting a clear, concise, and professional overview.