Wireless Pet Fence GPS Boundary SystemGive your dog the freedom to roam while keeping them safe with the PawGuard GPS Wireless Electronic Pet Boundary System. This customizable system lets you set a boundary up to 650 feet (200 meters) with adjustable levels from 0 to 100, giving your pet a huge 5,000 square meters to play in. The best part? The boundary is completely invisible, thanks to the buried perimeter wire that won't ruin the look of your yard. The system is built to last, with a