Product information: 3M Littmann Master Cardiology Stethoscope, Black Tube, 27 inch, 2160: - Master Cardiology Stethoscope is characterized by the best acoustic response of all Littmann mechanical stethoscopes - Tunable diaphragm and pediatric adapter - Dual-lumen tubing offers superior sound quality Salient features of 3M Littmann Master Cardiology Stethoscope, Black Tube, 27 inch, 2160: - 3M’s ‘Tunable Technology’ lets you easily switch from low to high frequency sounds by switching from light to firm pressure. - Highest quality single-sided, handcrafted solid stainless steel chestpiece . - A special procedures adapter is included for paediatric, neonatal or difficult to reach auscultation. - Double lumen tubing (two tubes in one) for superior transmission and insulation of sound whilst eliminating "rubbing noise". - Anatomically designed headset comfortably positioned for optimal sound transmission. - Comfortable Snap-Tight soft seal eartips create an excellent acoustic seal to reduce ambient noise. - Durable latex free tubing and a robust headset that can be reliably flexed one million times. - Complement your personal style with Littmann’s large range of chestpiece finishes and tubing colours. - Used as a diagnostic aid as part of the physical assessment of a heart, lung and bowel sounds