The ultimate acoustical stethoscope. Patented single-sided "Master" chestpiece with tunable diaphragm lets you monitor both high and low frequencies without having to turn over the chestpiece. Features hand-crafted, solid stainless steel chestpiece, two-tubes-in-one design, lightweight comfort headset, special procedures adapter for difficult site and pediatric auscultation, nonchill rim, double-leaf binaural spring, and patented 3M Littmann Snap-tight Soft-sealing Eartips. 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 chestpiece, you'll get diagnostic information accurately and efficiently. The patented tunable diaphragm alternates between low and high frequencies without turning over the chestpiece. 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 Eartips assure maximum comfort and excellent acoustical seal. Nonchill rim and diaphragm assembly for patient comfort. Black tubing is available in 22" or 27" length. Note: Tubing length is measured from the top of the eartips to the bottom of the chestpiece. Seven-year warranty. Use Tunable technology provides convenience, versatility and enhanced acoustics. Its dual-frequency diaphragm combines both bell (low-frequency) and diaphragm (high-frequency) modes in one chestpiece side. You control bell and diaphragm modes by pressure on the chestpiece rather than turning it over.