Description A convenient tunable diaphragm in a single-sided coated alloy chestpiece providing reliable and clear acoustics. The Littmann™ Select Stethoscope features a patented tunable diaphragm that alternates between bell and diaphragm modes with a simple pressure change on the chestpiece. Its reliable and clear acoustics offer an advantage to health care professionals when listening to heart, lung and blood pressure sounds. Also features single-lume