Designed to produce low volume Woodpecker distress chirps.  Designed to attract predators to the trap location.  Lithium battery has 10 day life span.  Press and hold the power button to turn chirp on or off.  
Is deadly on all predators that hunt or kill for food, including Coyote, Fox, Raccoon, Mink, Otter, Marten, Fisher, Bobcat, Lynx, and Wolf. 
Works well when placed in cubbies, live traps, and above pine sets.  It is recommended to use both the Kill Chirp and Kill Squeak as change-up sounds on your trap line.   
Batteries included.