About This ProductMulti-Function Air Quality Monitor: This indoor air quality monitor accurately measures real-time levels of carbon dioxide (CO2), PM2.5, PM10, formaldehyde (HCHO), and total volatile organic compounds (TVOC), helping you understand the air quality in your area.Portable Size: This six-in-one air quality monitor is compact and portable, making it easy to carry anywhere, allowing you to monitor air quality anytime, anywhere.LCD Backlit Screen: The CO2 monitor features an LCD screen with a color backlight, making each value clear and easy to read.Real-Time Display: This air quality monitor allows you to monitor air quality changes and view them on your phone. This allows you to take necessary actions to improve the air quality in your surroundings.Rechargeable Battery: Our indoor air quality monitor has a built-in 1200 mAh rechargeable battery and includes a USB data cable. The low-power processing chip enables continuous air quality monitoring. Wide application: The air quality meter is suitable for home, school, office, travel, indoor, outdoor, agricultural planting, production warehouse and other occasions. It will always take care of the health of you and your family.