1.Resistance Training: Adjustable resistance helps strengthen breathing exercises, train the diaphragm, and expand the chest cavity. 2.Steam Inhalation: Inhaling warm steam moistens the respiratory tract lining, soothes airway discomfort, and helps loosen phlegm in the trachea for easier coughing. / No medication required—using the Well O2 device supports the strengthening and care of the respiratory system. 3.Well O2 is suitable for elderly, people with COPD, asthma, or anyone looking to enhance their lung function.