MDF® Pulse Time Teaching Stethoscope with Embedded Digital LCD Clock - 4 Users - Navy Blue Do you hear what I hear? Medical instructors no longer need to describe heart and lung sounds to students. With the MDF® Pulse Time™ Teaching Stethoscope, instructor and students listen to the same source of sound, enabling multifunctional teaching applications in all clinical and educational settings. This innovative, patented Pulse Time™ chestpiece with a quadruple output is equipped with a 24-hour liquid crystal analog (LCA) quartz timepiece. The advanced chestpiece is made of lightweight anodized aluminum and fitted with a unique raised ultra-thin fiber diaphragm for greater amplification and transmission of heart and lung sounds.