This device harmonizes and protects your pets in the same way the Personal Rejuvenizer® does for people. Animals may experience a decrease in illness and enjoy a happier disposition. You can attach the Pet Rejuvenizer® to your pet's collar, or simply attach it to his or her water or food bowl. When attached to (or near) the bowl, one Pet Rejuvenizer® will work for up to three animals who live inside your house. A separate Pet Rejuvenizer® will take care of up to three animals living outside your house, when attached to (or near) their food or water container.