Spot on GPS Collar used for about a month. It fit my 80 lb Labrador with three more slots to increase the collar size if needed. It is a size Medium. Everything that came with collar is included with the box. I used the collar to keep my dog on my farm. She was a dog that I got from the Humane Society. And I purchased the collar to keep her within our boundaries, 100 acre but the problem was, I found out that she is severely frightened of thunderstorms and then she’s so frantic she runs right through the GPS fence if no one is around to comfort her and keeps on running, I have a feeling that is how she left her first home. So it’s a fine product because you can build fences anywhere but if the dog has storm phobia like mine it doesn’t work. I still have the dog , I co-parent with my son and we just deal with it but I always know when a storm is coming sometimes 8 hours before!

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