Littmann Master Cardiology Stethoscope The 3M™ Littmann® Master Cardiology Stethoscope is the essential acoustic stethoscope for accurate auscultation. This innovative product features a patented single-sided 'Master' chestpiece. This allows both high- and low-frequency sounds to be heard without rotating the chestpiece. Recommended for cardiologists and pulmonologists. A special procedure adapter is included for difficult areas and pediatric auscultation. The warranty period is 7 years. Product Features: Hand-crafted chestpiece made of stainless steel, double-lumen chestpiece, lightweight earpiece, non-chilling bell, earpiece spring set. Littmann Master Cardiology Stethoscope