The Higdon Pulsator II has a new heavy-duty bilge pump, a new and improved charger that charges the included 12-volt battery faster (7-8 hours) and charges cooler for a longer battery life. An included flexible pipe insert controls how much and how high your water sprays. Simply turn on the unit and drop it in the water. The cord and waterproof 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 half-second four times then pauses for four seconds which perfectly simulates feeding ducks.