We purchased some acreage that borders a state forest. I was having to chain my young Boykin while we were there since she kept wandering into the woods. With this I am able to let her roam and keep track of where she is and know if she is returning when I whistle. The first night we camped there, one of the horses decided to leave the temporary corral and go on a walkabout. Now they wear the collars at night. Also when the wife goes for a solo ride, I can keep track of her so I can find her if necessary.