If you’ve introduced a new pet to your household or have an older pet who’s started testing boundaries, the PetSafe® Pawz Away® Extra Receiver Collar can help keep him or her out of trouble. It works with all PetSafe® indoor and outdoor Pawz Away® systems, which act as an hidden barrier for your pets. When your cat or dog enters the barrier area, they feel a safe, progressive static correction from their receiver collar which trains them to recognize an “off limits” area. Designed for indoor and outdoor use, the waterproof receiver collars are designed for dogs and cats over 5 pounds with neck sizes 6-28 inches. The Pawz Away® system works with an unlimited number of pets if they are wearing a Pawz Away® Receiver Collar. PetSafe® brand is here to help you and your pet live happy together™.