Quick and easy to use - This breathing trainer is an invaluable tool for swimmers, divers, sportsmen, singers and woodwind musicians. Universal for the most users - Our lung trainers come with three stainless steel ball bearings, allowing you to adjust the minimum or maximum surge to suit your lung capacity, age and current health condition.</ Quick and easy to use - Our breathing apparatus is simple in design and does not require recharging or batteries, it is easy to use and clean. Use it for just 5-10 minutes, once or twice a day. Designed to help train the lungs - This breathing trainer can facilitate gas exchange, improve lung strength, lungs, reduce shortness of breath and improve quality of life. Non-drug, independent lung trainer - OPEC applied, Continuous use can help dissolve mucus and promote coughing for better eliminate mucus. For lung and lung diseases, after surgery, anesthesia, mechanical ventilation, etc. lead to a decrease in lung function Respiratory function patient's lung is restored, reducing and preventing postoperative pulmonary complications. If there is too much secretion in the lungs, if it is difficult to exclude, purchase bronchial drainage and the airway will clear sputum. Applicable situation: 1. Too much phlegm, spitting up 2. Cough, clear phlegm 3. Nasal congestion, not breathing 4. Difficulty breathing, panting 5. Hiccup 6. Thin face 7. Improve lung capacity 8. Sing to open your voice 9. Constipation, indigestion 10. Headache 11. It can be used for obsessive-compulsive disorder, saliva swallowing, throat discomfort, etc. White color