The ultimate acoustical stethoscope * Tunable diaphragm conveniently alternates between low and high frequency sounds without the need to turn over the chestpiece * Handcrafted sold stainless steel chestpiece * 2-in-1 tube design eliminates tube rubbing noise * Portable convenience of a single-sided chestpiece * Excellent acoustic seal and comfortable fit with patented Littmann Snap Tight soft-sealing eartips * Comfortably angled, anatomically correct headset * Patient-friendly, nonchill rim and diaphragm. Special procedures adaptor for difficult site or pediatric ausculation * Available in a selection of classic tube colors * 7 year warranty