3M Littmann Lightweight II S.E. Stethoscope, Black Tube, 28 inch, 2450 is an ideal entry level instrument, with a tunable diaphragm, dual sided chestpiece and reliable acoustic performance. Its teardrop shape makes auscultation around blood pressure cuffs easier. | Uses: Used to detect sounds in the body to check any diseased condition | Salient Features: Lightest weight of all Littmann adult stethoscopes at just 118 grams Dual sided chestpiece provides versatility of both a tunable diaphragm and open bell Teardrop shaped chestpiece for easier positioning under blood pressure cuffs and around bandages Tunable diaphragm: Hear high or low frequency sounds by slightly adjusting pressure on the chestpiece Soft sealing eartips provide an excellent acoustic seal and comfortable fit Tunable diaphragm technology provides clinicians hear different frequency sounds by simply adjusting the pressure on the chestpiece 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 eartubes Snap tight, soft sealing eartips conform to individual ears for an excellent acoustic seal and comfortable fit Eartips snap firmly onto the ends of the eartubes and, for safety, require a significant effort to remove Next generation tubing is not made with natural rubber latex, a benefit to sensitive medical professionals and their patients Convenient and comfortable to use | Directions For Use: Hold the chestpiece 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 | Safety Information: Read the label carefully before use Keep out of the reach of children