INKBIRDPLUS PM2.5 Indoor Air Quality Monitor, Portable PM2.5 PM10 and Temperature Humidity Detector, with Sound and Light Dual Alert, PM2.5 PM10 Indication, for Home, Office, School

PM2.5 Indication: This 4-in-1 detector incorporates a 3-color breathing light to provide intuitive indications of air quality. Green (0 to 34 μg/m³) indicates good air quality, orange (35 to 110 μg/m³) indicates a warning, and red (above 110 μg/m³) indicates danger, enabling you to swiftly assess the air quality