Drug-Free Independent Therapy Mucus Remover - Features OPEP technology, a globally trusted therapy. Continued use can help loosen phlegm and promote coughing to better remove mucus. Effective for many respiratory conditions - This device is designed to assist individuals with respiratory concerns such as asthma, atelectasis, bronchitis, and cystic fibrosis. Suitable for most users - Includes three stainless steel ball bearings to adjust minimal or maximum positive pressure based on lung capacity, age, and health condition. Quick and easy to use - The mucus clearing device has a simple design with no refills or batteries required. Use for 5 to 10 minutes once or twice daily. Designed to help support lung function - May assist in promoting gas exchange, improving lung strength, reducing breathlessness, and enhancing quality of life.