Heartbeat Simulator Module: The heartbeat Simulator need 3 AAA batteries(No battery included in the package). Press the button, then the heartbeat module works. Easy to operate. Seperation anxiety in dogs:Bringing home a puppy is exciting, but don’t forget, your little one is just a baby who craves security and comfort. Give your little pet the warmth they need and recreate maternal intimacy with this adorable interactive toy. And when the time comes for crate training, cuddling with their heartbeat buddy will help reduce negative behaviors, such as whining and barking, which also helps you sleep at night. The WEOK heart simulator creates a realistic sound and feeling of a heartbeat that gives dogs, young and old, the companionship they need to sleep through the night with no whining, no barking, and no accidents. Calming Comfort: WEOK heartbeat dog toy for puppy give your puppy dogs relief from separation anxiety and help them sleep safe and comfortable with toys designed to simulate the heartbeat of their mother and littermates. Pets feel less anxious and stay more calm, helping them to sleep at night and reducing problem destructive behavior. The best replacement heartbeat device for WEOK puppy plush toys; Our heartbeat toys for puppies and kittens are carefully crafted to be safe and reliable. Works great as a puppy heartbeat soother or in a heartbeat pillow for dogs or cats. Anxiety Relief: The WEOK heartbeat puppy toy simulates an atmosphere of accompany, it can help puppies and cats to relief the separation anxiety, loneliness, go through the tough time and adapt the new home or other complex environment. It is a good behavioral training aid toy which could comfort your puppies sleep better.