Description The 3M Littmann Master Cardiology Stethoscope is a single sided acoustical stethoscope allows to hear both low and high frequency sounds. Its tunable diaphragm and superb craftsmanship provide an ultimate performance. This stethoscope features hand-crafted, solid stainless steel chest piece, soft-sealing ear tips, lightweight comfort headset, two-tubes-in-one design, double-leaf binaural spring and non-chill rim. It also includes a special procedures adapter for difficult site or pediatric auscultation.