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Title: It Is a Dud
Review: It may very well work as a training aid. I don't know as I did not try it as such. However, for a dog repeller it isn't worth a diddly squat. After two months of testing it I withdrew my battery and pitched it. The repeller, not the battery. I can tell that dogs do not like the sound that it emits. But so far as stopping an aggressive dog, forget it.
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