Acapella combines the benefits of both PEP therapy and airway vibrations to mobilize pulmonary secretions and can be used in virtually any spatial orientation: you are free to sit, stand, or recline. This also takes less than half the time of conventional CPT sessions and facilitates opening of your airways for lung diseases with secretory problems (COPD, asthma, Cystic Fibrosis). Color-coded units (green for high-flow and blue for low-flow) help customize treatment based on clinical needs. You can change the Acapella’s frequency and flow resistance simply by turning an adjustment dial.
I've used a different acapella which was unreliable. I never question whether this one will work - it always does!
Directions were very basic, to say the least. Could have been more detailed or descriptive. Especially since could cause damage to user if done improperly.
I've used another a capella, and it would work at times. So far, this has been great! Consistent, dependable, easy to use and clean.
I've been using these for many years. I have gotten ones that work very well, and ones that don't. I've even had a couple that only worked when held upside down. I would tell those of you who haven't found one helpful to try another one. I don't know if the supplier offers a money-back guarantee, but given the price and the frequency of problems they should.