@sharonednaramsey Hi, Sharon. The breath-activiated nebulizers apparently run only when you take a breath. That would really slow down the rate at which you nebulize the solution in your nebulizer cup. Moreover, some people nebulize precise amounts of the saline (e.g. they make sure they nebulize all four ounces of solution), so this would really show down the process. I use a Proneb Max from Pari, along with the LC Sprint cup, which runs continuously.