Avian X Power Shaker Mallard Hen Surface Feeder Motion Decoy Foam filled decoy Patent Pending design ​ Shaker module ​ Authentic preening motion fools the wariest of fowl ​ Creates wake in spread that ultimately makes adjacent decoys move as well ​ Power Shaker will save the hunt on no wind days ​ Makes your entire decoy spread come alive Powered with (4) AA batteries (not included) for up to 10 hours run time​