Calling elk is filled with nuance. The Phelps All-American AMP diaphragm elk calls were designed with those nuances in mind for the ultimate user experience. Have you ever wondered how competitive callers deliver those realistic elk sounds on stage and in the field? We've teamed up with these three RMEF World Champion competitive elk callers to bring you a series of diaphragms to perform at every level in the most important contest of all, between you and a wild bull elk! Features3 PK of AMP diaphragm callsDesigned by RMEF World Champion competitive elk callersVersatile call design allows for a variety of sounds