Series:Wobbling Decoys3 Wobblers will replace a 60 decoy spread. The Wobblers are made for the water fowler that has a duck hole without wind to create movement in the decoys. Perfect for still water swamps, low marsh holes where the wind blows over the top, calm wind days, beaver ponds, and other still water locations. Operates on a single AA battery for up to 8 hours. Ducks know that live birds will have ripples around them at all times. Nothing will make a Duck fly by a spread more than the lack of ripples.These Ure - a - Duck Wobblers are made of unsinkable urethane foam with a plastic coated shell. The wobble making instrument is a standard wobble ball; the difference is that this ball is affixed to the detachable keel, so the momentum and wobble action is centrifugal.All wobblers are replicas of competition quality sculptures with magnum size. These decoys put out ripples that attract from a long distance.No further information is available at this time.