A three-ball spirometer is a device designed to improve the functioning of the lungs. It enhances blood supply to the respiratory system by normalizing the concentration of carbon dioxide in the blood while strengthening the musculature of the chest. Three-ball spirometer is used for therapeutic and preventive purposes. When inhaled through the mouthpiece and flexible tube, the balls will float inside the clear chambers. Features include: – Compact – Easy to use – Clinically effective – Suitable for all ages