Versatile chestpiece design provides high acoustic sensitivity with both a tunable diaphragm and open bell. Tunable diaphragm Hear high or low frequency sounds by slightly adjusting pressure on the chestpiece. Non-chill rim and diaphragm provide patient comfort. 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.