The 3M Littmann Lightweight II S.E. Stethoscope provides reliable acoustic performance for taking blood pressure readings and making limited physical assessments of adult patients. Weighing just 118 grams, its the lightest of all Littmann adult stethoscopes, making it more comfortable for caregivers who wear their stethoscopes all day long. The Lightweight II S.E. stethoscope is an entry-level instrument that offers a surprising number of beyond-the-basics features such as a tunable diaphragm, dual-sided chest piece, and adjustable headset. Its a good choice for medical professionals such as LPNs, licensed vocational nurses, certified nursing assistants, and nursing students. Tunable diaphragm technology 3M invention lets clinicians hear different frequency sounds by simply adjusting the pressure on the chest piece. Hold the chest piece with light pressure to hear low frequency sounds; press a little more to hear higher frequency sounds. This time-saving feature allows the healthcare provider to focus on the patient, while the non-chill diaphragm and rim provide patient comfort. Resilient tubing retains its shape and flexibility even after folding tightly into a pocket. Headset tension is easily adjusted for head size and comfort by squeezing together or pulling apart the ear tubes. Snap-tight, soft-sealing ear tips conform to individual ears for an excellent acoustic seal and comfortable fit. Ear tips snap firmly onto the ends of the ear tubes and, for safety, require a sign