Hello, @rvan - I am not quite sure what you mean - this is a picture & description of the only Aerobika I am familiar with. https://www.nationaljewish.org/conditions/medications/airway-clearance-techniques-devices/using-the-aerobika

There is another PEP (Positive Expiratory Pressure) device that is also often prescribed. You can read about it here: https://www.nationaljewish.org/conditions/medications/airway-clearance-techniques-devices/acapella-dm-dh
Some doctors recommend one over the other, others leave it up to the patient's choice.

Here is my experience with both: I originally was prescribed the Green Acapella device, but I was using 2 different nebulised solutions at the time, and wanted to be able to do both airway clearance and nebs at the same time, so switched to the Aerobika. I found that, for my lungs, it was too difficult to do both at once, so I still do them separately.

I continue to use the Aerobika instead of the Acapella because:
1) I can completely disassemble the Aerobika for thorough cleaning, but only do rudimentary cleaning of the Acapella device. Since I am susceptible to MAC and Pseudomonas, to me more cleaning is better.
2) I can also more easily adjust the pressure on the Aerobika, which for me is good because my lung conditions varies quite a bit day-to-day.
3) Finally, the more compact Aerobiks fits into my pack better for travel.

In the end, it is a matter of personal preference...
Sue