Primos Sonic Dome - 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. Simple and dependableAutomatically positioned correctly in your mouth Sonic Dome. Series calls use latex reeds