3M Littmann Classic II S.E. Stethoscope, 28", Emerald Tube, 2837 High acoustic sensitivity in a dual-sided chestpiece combines with durable, compact design to deliver versatile auscultation and rugged dependability Tunable diaphragm responds with a simple pressure change to capture low and high-frequency sounds without the need to turn over the chestpiece Anatomically designed headset is angled to meet the path of the ear canal and provide optimal listening.Care - Do not immerse your stethoscope in any liquid or subject it to any sterilization process Latex-free materials for allergy sensitive users Non-chill rim and diaphragm provide welcome patient comfort 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 Allows you to perform neonatal or pediatric auscultation with special-procedures adaptor included with stethoscope purchase