Combination diaphragm/bell chestpiece for wide frequency response. Lightweight aluminum chestpiece construction. Non-chill diaphragm rim for patient comfort. Diaphragm diameter 1 3/4", bell diameter 3/4". Non-chill bell ring and diaphragm for patient comfort. Proprietary diaphragm enhances acoustic response by 50% over traditional designs. Adjustable aluminum binaurals with PVC eartips. Flexible 22" PVC tubing. Spare pair of black mushroom eartips included. Inspected and packaged in the U.S.A. Weighs 3 oz. Overall length 32.5". One Year Warranty.