Real-time air quality tracker: constantly monitors the environment and accurately measures a variety of fine particles, volatile organic compounds (VOCs) such as acetone, methanol, formaldehyde, and harmful gases. PM sensors detect PM1, PM2.5, and PM10 contaminants such as dust, pollen, soot, and mold spores. Portable and compact: can be securely attached to a bag or belt. Includes a weather station with sensors for atmospheric pressure, temperature, and humidity for indoor and outdoor use. Mobile app: displays air quality values and helps track measurement history and personal air score. If air quality drops below a certain point, you will immediately receive an alert. Dimensions: Width: 3.81 cm, Height: 12.7 cm, Depth: 12.7 cm, Weight: 0.181 kg