The PetSafe Wireless Pet Containment System is a reliable, portable pet containment system that uses advanced wireless fence technology to create a secure, invisible boundary perimeter without digging. The circular boundary can be adjusted to cover up to 1/2 of an acre, offering a flexible and accurate wireless fence solution that sets up in just 1–2 hours. Simply plug the training transmitter in inside, place the included boundary flags, and customize the range to suit your yard or travel destination, perfect for RV trips or vacation homes. The included waterproof receiver collar features a tone-only mode and five adjustable static correction levels, making it easy to tailor the training to your dog’s temperament. Static-free reentry further reinforces positive behavior. The collar operates on a replaceable RFA-67 battery, which lasts 1-2 months, and includes a battery status indicator for added convenience. This adjustable collar is intended for dogs at least 6 months old weighing 8lbs+ and fits neck sizes from 6-28 inches. This multi-pet training system supports additional collars, allowing all your pets to enjoy the yard safely. With over 25,000 five-star reviews, the PetSafe Stay & Play Wireless Fence delivers a reliable, expert-recommended way to keep your pets safe, happy, and free to play. Since 1988, PetSafe has been driven by a simple belief: safe, healthy pets lead to happier lives for pets and their families. For over 25 years, we've been dedicated to enhancing the lives of pets and the people who love them, treating every pet as a cherished family member and delivering life-changing innovations designed to enrich every moment. With U.S. roots and a global reach, our vet- and trainer-recommended products are built for every pet and backed by exceptional customer support. From backyards to dog parks, we're on a mission to create fields of joy for happy, healthy, and safe pets.