The 3M Littmann Cardiology Soft Touch Chestpiece (S.T.C.) Stethoscope uses a combination of precision and superior audible quality to provide an exception listening experience. This stethoscope comes with a non-chill rim and diaphragm and a supple, easy to grip chestpiece that makes it easy to move between different parts of the body. The headset is designed anatomically. It allows prime sound transfer through the angled headset designed to fit comfortably into the ear. Its two in one tube design prevents noise normally caused by the tubes rubbing together. The tunable technology conveniently allows you to hear both low and high frequencies correlating with the amount of pressure applied to the chestpiece.