Littmann lightweight II S.E. This general purpose stethoscope is not only lightweight and easy to carry, but it also features a chest piece designed for better orientation around blood pressure cuffs and body contours. The tunable diaphragm conveniently alters between low and high frequency sounds without the need to turn over the chest piece. Features a single-tube design, rimmed nonchill diaphragm and bell, firm ear tips and two-year warranty.