Featuring a two-sided chestpieces, this classic stethoscope offers high acoustic sensitivity for superior performance. A patented tunable diaphragm on one side augments the traditional bell function of the opposite side. Traditional bell combined with a patented tunable diaphragm that conveniently alternates between low and high frequency sounds without the need to turn over the chestpiece. Excellent acoustic seal and comfortable fit with patented 3M Littman Snap Tight soft-sealing eartips. Angled, anatomically correct headset provides user comfort and better acoustical seal. Nonchill rim and diaphragm increase patient comfort. Single-lumen tubing. Three year warranty. 28" tubing.