Advanced Air Quality Testing: This 6-in-1 air quality monitor is your ultimate choice for ensuring intake. Color-coded air quality indicator: always know the air you breathe, Our air quality monitor displays overall air quality in an easy-to-understand color-coded system - green for good, yellow for moderate, and red for poor - to help you take necessary actions based on your air quality readings. User-friendly Operation: This air monitor has a simple design with a one-page full-screen display and a simple function button. Our air quality monitor is designed for use . Whether you're traveling, camping, or moving between rooms, it's the perfect size to take it with you and monitor air quality. Versatile Application: Suitable for a variety of environments, including home, office, school, car, hotel, etc. This air tester is an essential tool for evaluating the air quality in kitchens, bedrooms and other living spaces, ensuring that your surroundings are always safe and comfortable. Colour:As Shown Material:ABS Package Contents: 4 x Air quality detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.