The 3M™ Littmann® Classic II Infant Stethoscope is specially designed for use on the smallest patients. It delivers high acoustic sensitivity, through its dual-sided chestpiece, for both high and low frequency sounds. It is used by medical professionals and students alike to identify, listen to, and study heart, lung, and other body sounds for physical assessment and diagnosis in infant patients. 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.