Does your new puppy feel lonely and anxious when they left their mom? Then our new puppy comfort plush toy will be the best present for them. Our heartbeat plush dog toy simulates the heartbeat sound to accompany new baby pets who leave their mother, its special design helps to relieve anxiety in your beloved new pets. Easy to operate 1. Put the heart beat simulator with 3 AAA batteries (not included) in the plush toy, turn on the switch, and it will work then. If not in use, suggest to turn off the on/off button to save energy. 2. Please keep the button off when not in use.