So you would like to let your dogs play outside without worry of them escaping? The Petsafe Stay & Play Wireless Dog Fence system can help. It lets you create a circular boundary up to 3/4-acre to keep your pet inside. Since it is portable, you can take this wireless fence anywhere.
The collar has 5 levels of adjustable static correction. You can contain an unlimited number of pets in an area of 22 to 105 ft in all directions.