HI..no, never heard of it until you posted.

Hi I do have one as well. So first setting low is to exercise your lungs. 2nd setting is to clear mucus. I’ve had one for 2 yrs now but just read recently about the 2 settings. It does seem to help both ways.

I use Aerobika works great it's available in Canada

They are great never do without it

Thanks, just started using one. Good to know.