Simply replace the existing battery door with the FoxJack 4, attach the connector from the decoy to the connector in your Fusion, Crossfire or FX7 digital game call, and you're ready to go. The FoxJack 4 comes with a bird topper (which resembles a woodpecker) and a whisper-quiet motor. Use the FoxJack 4 to add realism to give predators the visual confirmation that they are looking for. It can be controlled remotely with your FOXPRO Fusion, Crossfire or FX7 digital game call (game call sold separately).