The FDA-cleared Littmann CORE Stethoscope toggles between analog and amplified listening modes so you can listen how you want to during assessments. Tunable diaphragm technology—a invention—lets you hear different frequency sounds by simply adjusting the pressure on the chestpiece. Hold the chestpiece with light pressure on the patient to hear low frequency sounds; press a little more to hear higher frequency sounds. Soft-sealing ear tips conform to individual ears for optimal comfort and excellent sound occlusion. Connects to Eko software to visualize and share heart sound waveforms (smart device not included).Exterior finish : Stainless Steel Up to 40x amplification (at peak frequency, vs. analog mode) Active noise cancellation reduces unwanted background sounds Toggle between analog and amplified listening modes Soft-sealing ear tips provide an excellent acoustic seal and comfortable fit; Tunable, dual-sided stainless steel chestpiece with open or closed bell10% 2-year warranty DISCOUNT FOR ALL ALUMNI, BE SURE TO CREATE AN ACCOUNT PRIOR TO ORDERING.