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 Lightweight scope is neither bulky nor awkward to use Stainless steel binaurals 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 sizes for the ultimate in wearing comfort and acoustic seal Scope ID Tag included Eight printed designer diaphragms included for personalizing