The Hyper LIPA(R) Double with Tone Converter(TM) makes calling elk easy. The Tone Converter(TM) converts the locating calls of the Hyper LIPA(R) into more subtle sounds Super simple and extremely effective. Just like the Hyper Lip Single however the Double has two reeds. This call has total quality that some bulls react to like no other! Learn how to use the Primos Hyper LIP elk call. This is an open reed call designed to make cow elk sounds. It comes in a single or double reed. The Hyper LIP Single produces high-pitched sounds of cows and calves while the Hyper LIP Double produces the deeper and louder tones of the matriarch cow.