The Littmann Master Classic II Stethoscopes has excellent acoustic sensitivity of a tunable diaphragm is the hallmark of this superior single-sided stethoscope. Award-winning design combines high performance with portable convenience. The Littmann Master Classic II stethoscope features a tunable diaphragm, which allows the user to conveniently alternate between low- and high-frequency sounds without turning over the chestpiece. * 27" overall length. * A tunable diaphragm conveniently alternates between the low- and high-frequency sounds without turning over the chestpiece. * Portable convenience of single-sided chestpiece. * High-performance single-lumen tubing for excellent acoustic performance in a range of attractive colors. * Award-winning, ergonomic design. * Excellent acoustic seal and comfortable fit with patented 3M™ Littmann® Snap Tight Soft-Sealing Eartips. * Comfortably angled, anatomically correct headset. * Patient-friendly, nonchill rim and diaphragm. * Three-year warranty.