Product details:

The Aerobika Oscillating PEP (OPEP) device is drug-free, easy to use and clinically supported. Patient feedback indicates that daily use of the device improves ease of mucus relieving, reduces cough frequency, reduces wheezing, increases exercise tolerance, and improves quality of life Exhaling into the device helps loosen and remove mucus from the lungs. Excess mucus in the lungs can cause health problems. Excess mucus in the lungs can cause shortness of breath, difficulty with simple tasks, and poor quality of life. If left unaddressed, excess mucus can lead to lung infections and worsen your condition. Current drug treatments have not been able to show a significant impact on mucus removal.Close lips around the mouthpiece.
Inhale and hold for 2-3 seconds.
Exhale slowly but firmly.
Repeat as directed.