The PetSafe Wireless Fence Pet Containment System is a great way to keep your pets safe and secure. With a wireless boundary that covers up to 1/2 acre, this system is perfect for large yards or parks. The waterproof collar comfortably fits dogs 8 pounds and up, and the static-free reentry feature makes it easy to correct your pet when he strays. The long battery life means you’ll be able to use the system for months without worry about your batteries dying midproject.