Halo GPS collar works great when is a open area, I live in the woods and the gps has some issues connecting so I have to get a wire fence, my loss your gain! This is a Halo2+ I believe, is you get this and then get the Halo care plan in 90 days you can upgrade to the Halo3 for $199, so net you are still under the $600-$699 for a new Halo3. I have collar, charger, beacon, and additional prongs.