This high-performance stethoscope is characterized by robust durability and the technology of the adjustable diaphragm. Switch between low and high frequency sounds with a single pressure on the chestpiece. Make the difference with the unmistakable, distinctive quality of a 3M™ Littmann® Master Cardiology™ stethoscope. Our non-electronic top stethoscope gives you the quality and durability you can expect from 3M™. Features of the 3M™ Littmann® Master Cardiology™ stethoscope: The adjustable membrane allows the user to easily switch between high and low frequency sounds without having to flip the chestpiece, Handmade chestpiece, all stainless steel, Dual-lumen design that eliminates noise in the tube as two tubes rub over each other, Portable comfort of a single-sided chestpiece, Anatomical comfort and excellent acoustic insulation with patented 3M™ Littmann® stethoscope. Snap Tight Soft-Sealing earplugs, Comfortable angle, Anatomical comfort. This ensures a snug fit, minimizes air leakage and prevents loosening of the ear mold over time. The double spring ensures that pressure on the ear can easily be adjusted through the ear mold, Patient-friendly, anti-cold sleeve and membrane. Adapter for special procedures in difficult places or for paediatric auscultation, You will not hear the unwanted "rubbing noise", thanks to the clever design. One tube contains two parallel sound channels to minimize friction noise, Allows you to perform neonatal or pediatric auscultation with the procedure-specific adapter. This is included with the stethoscope. Add a personal note by choosing a tubing and chestpiece in a color that suits you. There is a wide choice.