I purchased this "waterproof collar" to assist in training my dog. He learned quickly that the tone was immediately followed by a shock if whatever behavior he was exhibiting did not stop. Sadly, I have a dog that enjoys the sprinkler system....and I found out that the collar was not waterproof. I now found myself out $130.00 for a training collar that only lived about two months.I contacted PetSafe and braced myself for a fight while attempting to get them to honor their "Lifetime Warrantee," but was pleasantly surprised that they were both responsive and courteous. The support employee on the phone immediately stated that he was not comfortable with trying to repair a unit that had been wet on the interior, and he immediately shipped a new unit with a return postage label for the broken unit.While I do not think this product is everything it could be, the warrantee and the support from PetSafe motivated me to change my initial rating from 2 stars to four.