Seriously life-changing! Once I worked it out..... Slow learner alert! Fortunately, my dog was a very fast learner after she got a level 3 shock mid charge at a horse and rider on the road outside my gate!!! I bought my Dogline Fence after losing my gorgeous Miss Perfect when she got led astray by my older escapee beast after we moved to a 2 acre block. The older dog dug under the fence on a hot afternoon and took Miss Perfect with her. They both returned, but Miss Perfect collapsed with heatstroke and died later that evening. After that, I bought the Dogline fence. I now need another collar to put on my 6 month old pup.