Nolte - thanks for the info. That makes so much more sense. It also clears up the 5 min vs 7 min times you can set the collar to. If it's receiving info every 7 minutes, that's more territory the dog can cover without getting a new GPS coordinate...Thanks again!!

I'm confused about the language on the Garmin. On their website, it says the collar communicates with the handheld by line of sight radio waves. If this is the case, what is the need for the satellite antennae on top of the collar? I did see where you can increase the life of the collar by ...