ADC Adscope 601 Convertible Cardiology Stethoscope with Tunable AFD Technology, Adult Diaphragm and Adult Bell or Pediatric Diaphragm, 28 inch Length Convertible chestpiece for adult diaphragm/bell or adult/pediatric diaphragm configurations, with an adjustable frequency design (AFD) to enhance acoustic performance. Chestpiece is CNC machined to exacting tolerances from surgical stainless steel. High-performance cardiology headset features large-bore stainless-steel binaurals and Adsoft Plus silicone eartips for the ultimate in wearing comfort and acoustic seal. Includes two additional pairs of Adsoft Plus eartips and a complimentary scope ID tag. Lifetime warranty and free "consumables," including diaphragms and eartips, when registered.