This total unit is absolutely awesome! The perfect decoy for adding just the right amount of ripple on the water! The cord and battery compartment acts as a cord and weight so there is no need to attach a separate weight. Unit has a built in timer that surges a spray of water every 1.5 seconds which perfectly simulates feeding geese. Add mutiple units to your spread and watch your decoys come to life. After the days hunt, simply open up the waterproof battery box and re-charge the battery with the supplied charger. No more strings for creating ripple and no more running wires back to your blind. Throw this out and let it do all the work.