Specifically designed to help elk hunters sound like a big bull elk easily, the Phelps Game Calls Signature Bull Single Reed DiaphragmElk Call produces crisp, realistic elk sound. A comfortable, easy-to-use mouth call that lets hunters keep their hands free for glassing and shooting, this versatile call makes large bull vocalizations with the finesse to also make great cow calls. Built to exact specifications and standards to ensure lasting reliability. Easy-to-use diaphragmcall for elk hunters Designed to help elk hunters easily produce big bull sounds Versatile design offers the finesse to make great cow calls as well Built to exact specifications and standards