Big Bore, big guts, and big sound. The RNT Quackhead Barbelly Specklebelly Goose Call is the easy to operate and produce realistic Specklebelly sounds due to its built in back pressure. This call produces all ranges of Specklebelly sounds, from the nastiest murmur to the loudest ear piercing yodel. FeaturesPolycarbonateBuilt-in back pressureEasy to operate