• Littmann quality present throughout the model, from the super-soft eartips to the bell design. • Dual-sided with dual-frequency diaphragm to listen to high and low-frequency sounds simply by varying the pressure applied to the bell. • For low-frequency sounds, use the open bell. • 3M Littmann Super-soft patented snap-tight eartips that provide acoustic isolation and a soft, comfortable fit. • Achieve proper sound transmission thanks to the anatomical design of the binaural that provides an optimal fit in the ear canal. • Bell diameter: 47 mm and 36 mm. • Stethoscope length: 71 cm.