?Complete Set?: You'll receive 1 medical-grade mucus removal device, 3 sizes and weight medical vibrating balls, 1 mouthpiece, and 1 instruction manual. Use different sizes of steel balls according to your lung mucus, and adjust from minimum to maximum positive pressure. If you have any questions about use, please contact us. We will answer you in time. ?Auxiliary Treatment of Respiratory Diseases?The mucus removal device provides a positive exhalation pressure (OPEP) treatment for people with too much mucus and patients with respiratory diseases, as well as those with poor breathing. Including asthma, pneumonia, bronchitis, bronchial dilatation, emphysema, chronic obstructive pulmonary disease (COPD) and other people with similar diseases. ?Suitable for Most People?: Our mucus removal device is recommended for use each morning and evening, 5-15 minutes each time. Long-term use will help to better remove the lung mucus and then breathe better. The mucus clearing device is suitable for children, adults, elderly people, smokers, swimmers, athletes, mountaineers, singers, and divers. ?Easy to Use?: Simply exhale into the breathing device and let the vibrating ball drive chest vibration. Choose from 3 different sizes and weights of balls to adjust the susceptibility of exhalation and vibration of the lungs. Correct use will result in obvious chest vibration. Through the vibration airway, the mucus is loosened from the airway wall and discharge it. ?Clear Lung Mucus with OPEP Therapy?: Our lung exerciser provides oscillating positive expiratory pressure (OPEP) therapy, scientifically certified to loosen mucus from airway walls and help it flow out smoothly. The lung mucus removal device is an effective aid for respiratory diseases like bronchitis, asthma, and COPD.