Ring Zone™ Technology takes turkey calling to a whole new level with a scientifically designed call, proven to sound like a wild turkey.Ring Zone™ calls resonate at the same, specific frequencies of a turkey’s optimal hearing range and reproduce the exact same sound waves as a wild hen, as tested by an oscilloscope. Just add rhythm and you are calling exactly like a hen. The Starfire Crystal™ features high pitch and volume.Manufacturer model #: 06968.