3M Littmann Master Cardiology Stethoscopes The ultimate acoustical stethoscope. Hear both high and low frequency sounds from a patented single-side chest piece with tunable diaphragm. Soft-sealing ear tips. Features hand-crafted, solid stainless steel chest piece, two-tubes-in-one design, lightweight comfort headset, special procedures adapter for difficult site and pediatric auscultation, non-chill rim, double-leaf binaural spring, and patented 3M Littmann Snap-tight Soft-sealing Ear tips. Benefits 3M Littmann Master Cardiology Stethoscopes The 3M Littmann Master Cardiology Stethoscope provides the best acoustics Littmann stethoscopes offer, with a significant improvement in low-frequency response. With the unique Master chest piece, you'll get diagnostic information accurately and efficiently. The patented tunable diaphragm alternates between low and high frequencies without turning over the chest piece. This allows for same-site auscultation. Two tubes are incorporated into a single-tube design that eliminates noise artifacts created from two tubes rubbing together. Includes a flexible patented special procedures adapter designed for auscultation of difficult body sites (such as ankles, neck, wrists, etc.), pediatric and emaciated patients. The headset assembly is permanently set at an anatomically correct angle. This assures a proper fit, minimizes air leaks and prevents the headset from loosening over time. Patented 3M Littmann Snap-tight Soft-sealing Ear tips assure maximum comfort and excellent acoustical seal. Non-chill rim and diaphragm assembly for patient comfort. Seven-year warranty. Using Your 3M Littmann Master Cardiology Stethoscope with patented tunable diaphragm Tunable technology provides convenience, versatility and enhanced acoustics. Its dual-frequency diaphragm combines both bell (low-frequency) and diaphragm (high-frequency) modes in one chest piece side. You control bell and diaphragm modes by pressure on the chest piece rather than turning