Had a quick look at the website but it's application is not obvious to me...how does this thing work? Do you hold it against your chest and it vibrates, or is there some sort of mask attachment or what? Also it mentions about plugging into air or something (or am I getting mixed up now?) It looks cool, though, and although pricey its not as insanely pricey as the Vest - so even I could get one eventually (have to pay myself - africa, lol).