Littmann Cardiology STC Stethoscope The Littmann Cardiology STC stethoscope's innovative design allows easy movement and handling by the health care provider while still providing Littmann stethoscopes outstanding acoustics. • Tunable diaphragm technology allows you to conveniently alternate between low and high frequency sounds without turning over the chestpiece. See it in action... • Attractive chestpiece is easy to grasp in multiple hand positions. • Two-in-one tube design eliminates tube rubbing noise. • Excellent acoustic seal and comfortable fit with patented 3M™ Littmann® Snap Tight Soft-Sealing Eartips. • Comfortably angled, anatomically correct headset. • Patient-friendly, nonchill rim. • Available in a selection of classic tubing colors. • Latex Free (See latex statement.) • Six-year warranty.