Simple and dependable – You’re gonna love the way this call works. The Sonic Dome™ Series has been designed so the call is automatically positioned correctly in your mouth. The dome gives you a consistent distance between the reeds and the roof of the dome, for an incredibly consistent sound. The Sonic Dome™ Series calls use latex reeds. These calls will do it all. Features: Three Latex Reeds. Reproduces the growl, bugle, and chuckle of the herd bull.