The diver duck call creates the "brrrrr" sound that redheads bluebills scaup canvasbacks etc.Use to communicate.While traditional mallard calls have often times been used in a crutch this call has been specifically designed for the purpose of dedicated diver hunters.It features a removable plug in the exhaust barrel for added volume.Type: Duck CallSpecies: DucksMaterial: AcrylicSound Species: DucksElectronic: NoBattery Size: NoneColor: BlackStyle: Portable