3M Littmann Cardiology IV Diagnostic Stethoscope, Standard-Finish Chestpiece, Black Tube, Stainless Stem and Headset, 69 cm, 6152 vs 3M Littmann Classic III Monitoring Stethoscope, Ceil Blue Tube, 69 cm, 5630

Outstanding acoustics with better audibility of high-frequency sounds (adult side, firm pressure) Tunable diaphragm: Hear high or low frequency sounds by slightly adjusting pressure on the chestpiece Dual-lumen tubing: Two sound paths in one tube eliminates the rubbing noise of traditional double tubes Next-generation tubing lasts longer and resists stains; not made with natural rubber latex or phthalate plasticizers Headset is easily adjusted for individual fit and comfort; angled eartubes align with ear canals

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Two-sided chest piece with tuneable diaphragms on both the adult and paediatric sides Single-piece tuneable diaphragm is easy to attach and easier to clean because its surface is smooth without crevices Paediatric side converts to a traditional open bell by replacing the single-piece diaphragm with a non-chill rim Next-generation tubing provides longer life due to improved resistance to skin oils and alcohol; less likely to pick up stains Small tuneable diaphragm is useful for paediatric, small, or thin patients; around bandages; and for carotid assessment

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