@kllevinson @crystalena The Air Physio is a handheld OPEP device (Oscillating Positive Expiratory Pressure) . You breathe in through the mouth piece and it adds resistance when you exhale which loosens the mucus and helps to cough it up. I prefer the Aerobika which is a different brand because it has an adjustment for the amount of resistance you need. Also because I can attach it to my nebulizer and neb my 7% saline while using the Aerobika. Disinfecting equipment is very important too so I like that I can put the aerobika in a baby bottle sterilizer at the end of the day or boil if you don't have a sterilizer.