The S-air negative ion sterilization children's air purifier & spirometry all-in-one design is changing the air quality of the environment where children and infants live. The change of the side lighting effect is also the feedback of the results of the surrounding air quality detection. Modular spirometry testing for children. Form a one-stop solution to household air problems. The external curved control display screen is used for its operation and information feedback. In terms of styling and vision, it will also bring users a warm and extreme user experience.