Primos 951: The Long Range Tramplifier acrylic open reed elk call offers a combination of an acrylic barrel, sound board and reed that produces very clear notes of cow and calf mews and chirps. The open single reed reproduces the high pitches of cows and calves taking all the guesswork out of locating those bulls. The Long Range Tramplifier is specifically designed with the acrylic barrel that lets this call reach out and touch Elk. Easy to blow and produces accurate estrous cow calls.