The Hyper Lip Double with Tone Converter makes calling elk easy. The Tone Converter converts the locating calls of the Hyper Lip Double into the more subtle sounds a matriarch cow uses when a bull has responded to her initial calls. This is important when trying to coax a bull in the last 100 yards. Remove the Tone Converter for louder calling when locating or calling bulls from longer distances. The open, double-reed of the Hyper Lip Double reproduces the deeper, louder tones of the matriarch cow.