Littmann master cardiology stethoscope. Known as the ultimate acoustical stethoscope, this masterpiece in one movement is designed to let you hear both high and low frequency sounds from a patented single-sided chest piece. Features a handcrafted, solid polished stainless steel chest piece, "two-tubes-in-one-design," lightweight headset, special procedures adapter for difficult site and pediatric auscultation, nonchill rim, double-leaf binaural spring and patented Littmann soft-sealing ear tips. Includes a seven-year warranty.