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Why the 3M Littmann Classic II S.E. Stethoscope is Top of its Class The 3M Littmann Classic II S.E. Stethoscope is a true clinical workhorse, providing high acoustic sensitivity through its dual-sided, stainless steel chestpiece; with a tunable diaphragm on one side and traditional bell on the other. It’s the choice of millions of care providers who are dedicated to achieving the best patient outcomes. Tunable Diaphragm Technology Tunable diaphragm technology, a 3M invention, lets clinicians hear different frequency sounds by simply adjusting the pressure on the chestpiece. Hold the chestpiece with light pressure to hear low frequency sounds; press a little more to hear higher frequency sounds. This time-saving feature allows the healthcare provider to focus on the patient, while the non-chill rim provides patient comfort. Soft-Sealing Eartips Headset tension is easily adjusted for head size and comfort by squeezing together or pulling apart the eartubes. Snap-tight, soft-sealing eartips conform to individual ears for an excellent acoustic seal and comfortable fit. Resilient next-generation latex-free tubing retains its shape and flexibility even after folding tightly into a pocket. It provides longer stethoscope life due to improved resistance to skin oils and alcohol, and is less likely to pick up stains. Features • Versatile chestpiece design provides high acoustic sensitivity with both a tunable diaphragm and open bell. • Tunable diaphragm: Hear high or low frequency sounds by slightly adjusting pressure on the chestpiece. Non-chill rim and diaphragm provide patient comfort. • Soft-sealing eartips provide an excellent acoustic seal and comfortable fit. Angled eartubes align with ear canals. • Headset is easily adjusted for individual fit and comfort. Resilient next-generation latex-free tubing retains its shape and flexibility even after folding. • made; latex free • 28 inches3M Littmann Classic II S.E. Adult Stethoscope.