Primos Sonic Dome - Simple and dependable - You're gonna love the way this call works. The Sonic Dome(R) 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(R) 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