Drug -free to independently treat mucus to remove global trust. Continue use can help loosen phlegm and promote cough to better remove mucus. It is effective for many respiratory diseases -this lung cleaner is precious tool for anyone with respiratory problems. It is used for asthma, pneumonia, bronchial dilation, bronchitis, cystic fibrosis, etc. For most users, GM-Our breathing auxiliary tools include three stainless steel steel ball bearings, so that the wear-resistant steel carrier bearings can be used so that the steel can be uniform In health, you can adapt to the minimum or maximum positive pressure. Easy to use quickly -our mucus cleaning equipment is very simple in design. It does not require battery, easy to use and clean. Use only 5-10 minutes or twice a day. The purpose of helping to train the lungs -this kind of lung exercise device can promote gas exchange, improve lung strength, reduce breathing difficulties, and improve the quality of life.