 because it's scanning the sounds coming out of the heart. And I will open up the model to show the interior part of the heart, the septum, the myocardium, the valves, and the chambers, and how the heart and what moves through in what direction, and where it's oxygenated, where it's not oxygenated, and try to give a better pictorial explanation of this, because I was taught this in chiropractic colleges.