Multifunctional Air Quality Monitors: The indoor air quality monitor can accurately measure real-time levels of CO2, PM2.5, PM10, HCHO, TVOC. To help you know the air quality of the place you live. Portable Size: The 6 in 1 air quality tester is small and portable, easy to carry anywhere you want, you can check the air quality anywhere and anytime. Backlit LCD Display: The carbon dioxide detectors come with LCD screen, the color display with backlight makes each value clear at a glance, easy identification and reading. Real-time Display: The air quality detector allows you to monitor the changes in air quality and you can also watch on your phone. This allows you to take necessary measures to improve the air quality in your environment. Rechargeable Battery: Our indoor air quality monitor is built with a 1200mAh rechargeable battery and packaged with a USB cable. The low-power processing chip can carry out uninterrupted monitoring of air quality for a long time. 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. Note: The data are all measured manually, please allow 1-3cm error due to different light and display, there may be some color differences, please refer to the actual item received.