?Package Included?Product include a puppy toy with heartbeat and a heartbeat simulator needed 2 AAA batteries, but batteries are not included. The plush toy can be can be machine washable after remove the heartbeat simulator. ?Easy to operate? turn on the switch of the heart beat simulator after insert batteries (batteries not included), then put it into the dog toy for puppy, it will work. ?Built Intimate Relationship? Dogs like to live in groups and cuddle with their partners, so our toy is simulated dog's shape, heartbeat and the scene of companionship to helps establish an intimate relationship with pets. ?Detail Design?Made of soft, comfortable, skin-friendly plush material and the inside is filled in soft polypropylene cotton, the heart beating dog toy is safe for your puppy. And the belly pocket is closed with a magic tape to prevent heart falling from the body. ?Realistic Heartbeat? With real smoothing heartbeat and soft plush gives dogs a sense of security, anxiety toys for dogs can help them adapt new environment quickly, reduce puppies' barking and crying, sleeps deeply in new home.