Simply attach a decoy-cord and weight and drop into the water for a quick set-up. Unit has a built-in digital timer that surges a highly visible spray of water and significant surface water disturbance, creating an ultra-realistic rocking/feeding motion that drives ducks wild. Add multiple units to your spread and watch your decoys come to life. With bright, high-contrast paint and deep, realistic carving, Higdon's XHD Hyper-Feathering makes these beautiful decoys spring to life. The XS Pulsator has an internal 12V 3amp lithium ion battery and timer that is built within the decoy housing which eliminates a traditional battery box attachment. Lithium Ion batteries are more durable, smaller and lighter in weight and are longer lasting versus the traditional lead acid batteries. No external battery box means less bulk and less weight.