Diaphragm only type chestpiece fabricated from lightweight acrylic provides up to twice the amplification of conventional acoustic scopes. No electronics to malfunction, no batteries to wear out. Stainless steel binaural with double leaf internal spring fixed at 15° angle for greater comfort. Reinforcing yoke molded into flexible 22″ PVC Y tubing. ADSOFT deluxe PVC eartips in small and large size. Scope ID tag included. Weighs 5 oz. Overall length 31″. Lifetime quality performance guarantee. Latex free.