www.halocollar.com

Works most of the time, but occasionally the location is not accurate and the collar sends corrections when he is completley within the boundary.

My only complaint is the GPS is not always accurate, it can be way off and then signals/warns when my dog is not even close to fence boundary.

These collars are a game changer for our 3 labs. The only drawback is that the batteries do not last long once charged. I understand the newer version lasts longer, but that does not help me when I already bought 3 of the collars.

Works great. Peace of mind we didn't have before. The only thing keeping it from a 5 star is our first two collars (2 dogs) stopped charging and had to be replaced. No issues for several months now - maybe 4 1/2 or 4 3/4 stars. Great product.

Only getting about 11 hrs of battery life per day on 2 collars other than that very happy.