Reward your achievement with the mark of distinction a 3M Littmann Master Cardiology Stethoscope. With a handcrafted stainless steel chestpiece and latex-free materials, this top-of-the-line stethoscope is designed for peak performance. Benefits Anatomically designed headset Two-in-one tube design (dual lumen) eliminates noise from two tubes rubbing together Pressure-based sound frequency adjustment with tunable diaphragm Special-procedures adaptor (included) for neonatal or pediatric auscultation