The new Avian X Power Shaker Mallard Hen Preener Motion Duck Decoy is designed to create the correct motion of dabbling ducks surface feeding and preening. This design is powered by a patent pending weight system that propels the decoy up and down instead of side to side, like other shaker decoys. The results are so lifelike that you are guaranteed to fool those wise old late season birds. Simply add several of these into your spread and get ready! This unit is very effective in the backwater areas where they are feeding or resting. It features a foam filled Avian X body, shaker module and is powered with 4 AA batteries (not included) for up to 10 hours of run time.FeaturesFoam filled Avian X Preener bodyShaker moduleAuthentic feeding and preening motion fools the wariest of fowlCreates wake in spread that ultimately makes adjacent decoys move as wellPower Shaker will save the hunt on no wind daysMakes your entire decoy spread come alive