The Tramplifier family offers a combination of an acrylic barrel, soundboard, 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 Short Range Tramplifier is specifically designed to make soft natural sounds of cows and calves that will get the bull to finish! Features: Premium Acrylic Barrel for extreme sound Open single-reed achieves higher pitch of cows and calves Easy to blow Produces accurate estrous cow calls