The 3M Littmann Master Classic II Stethoscope features tunable diaphragm technology that offers reliable, versatile acoustic performance and the portable convenience of a single-sided chestpiece. This stethoscope is used by students and medical professionals alike to detect, listen to, and study heart, lung, and other body sounds for physical assessment and diagnosis. 3M Littmann tunable diaphragm technology delivers excellent acoustic sensitivity, versatility and time-saving convenience. Switching between bell and diaphragm modes is as easy as a simple pressure change on the chestpiece, which means there is no longer a need to remove, index and replace for same-site auscultation. Resilient tubing folds tightly for pocket portability and retains its shape while patented Snap Tight Soft-Sealing Eartips help form an effective acoustic seal. The anatomically correct headset is angled to channel sound and enhance listening comfort while the nonchill rim and diaphragm provide patient comfort. The Master Classic II is made in the USA. The product and package are latex-free and come with an alternate pair of small eartips and instructions. 3M, Littmann and Master Classic II are trademarks of 3M Company.