Our factory produces high-quality breathing trainers such as the {600CC -900CC- 1200CC 3 ball spirometer breathing trainer breathing exerciser}. This product is designed to increase lung capacity, improve overall respiratory function, and enhance breathing efficiency. The three balls in the spirometer provide visual feedback on inhalation and exhalation ability, motivating users to achieve their breathing goals. With its compact and durable design, this breathing exerciser can be used by anyone, from athletes and fitness enthusiasts to individuals with respiratory conditions. Our factory is committed to producing reliable and effective breathing training devices that can help improve the health and well-being of our customers.