Drug-Free Independent Therapy Mucus Remover-globally trusted therapy. Continued use can help loosen phlegm and promote coughing to better remove mucus.Effective For Many Respiratory Conditions - This lung cleaner is an invaluable tool for anyone suffering from respiratory issues, used for Asthma, Atelectasis, Bronchitis, Cystic Fibrosis, etc.Universal For Most Users - Our breathing aids come with three Stainless Steel Ball Bearings so that you can adjust to Minimal or Maximum Positive Pressure depending on your lung capacity, age, and current health. Quick Easy To Use - Our mucus clearing device is simple in design and requires no refills no batteries, easy to use and clean. Use it for just 5 - 10 minutes once or twice a day. Designed To Help Train Lungs - This lung exerciser device can facilitate gas exchange, improve lung strength, reduce breathlessness, and improve quality of life.When to use an expectorantExcessive phlegm, unclean spit, improve lung capacity, cough, clear phlegm, singing to open the throat, nasal congestion, lack of ventilationConstipation, indigestion, dyspnea, panting, headache, hiccups, obsessive-compulsive disorder, drooling, throat discomfort, etc., face-lift. can be used in any situationVibration principle:By blowing air, the PEP and the airflow are vibrated, and the vibration frequency reaches resonance with the frequency of the human lungs. The oscillation of tracheal PEP is amplified, making the sputum in the airway wall loose, increasing the intrabronchial pressure intermittently, keeping the airway open during exhalation, and ensuring that the sputum rises smoothly. Accelerates the expiratory airflow and promotes the expulsion of phlegm. PEP positive pressure principle:Through the positive pressure generated during exhalation, the airway is opened, and the loose secretions are pushed from the bottom up into the large upper trachea. Once in the thick trachea, the secretions are more easily excreted through coughing.1. Hold, 2. Inhale, 3. Exhale (Do not bulge your gills when exhaling, your cheeks are tight, you can feel the vibration in your chest, (you can feel the vibration when you put your hand on your chest) 4. RepeatPrecautions: Adjust the angle, frequency of use: twice a day in the morning and evening, 5 minutes each time, clean after use, and can be disassembled and cleaned.