Primos Hunting PS934 Elk Call, Hyper Lip Double with Tone Converter Open double-reed reproduces deeper, louder tones of the matriarch cow Tone converter produces mellow and softer tones so important for calling in those call-shy Bulls Elk call hyper lip double with tone converter Open double-reed reproduces deeper, louder tones of the matriarch cow Tone Converter produces mellow and softer tones so important for calling in those call-shy bulls