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The 3M Littmann classic III stethoscope is the latest version of the stethoscope that helps millions of medical professionals achieve their best. The Classic III stethoscope offers high acoustic sensitivity for exceptional performance plus a versatile two-sided chest piece with tunable diaphragms. The Classic III stethoscope is used by students and medical professionals alike to identify listen to and study heart lung and other body sounds for physical assessment patient monitoring and diagnosis. Tunable diaphragm technology. A 3M invention lets clinicians hear different frequency sounds by simply adjusting the pressure on the chest piece. Hold the chest piece with light pressure to hear low frequency sounds press a little more to hear higher frequency sounds. This time-saving allows the healthcare provider to focus on the patient while the non-chill diaphragm provides patient comfort. Headset tension is easily adjusted for head size and comfort by squeezing together or pulling apart the ear tubes. Snap-tight soft-sealing ear tips conform to individual ears for an excellent acoustic seal and comfortable fit. Ear tips snap firmly onto the ends of the ear tubes and for safety require a significant effort to remove. Resilient next-generation 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. Next-generation tubing is not made with natural rubber latex to sensitive medical professionals and their patients.