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Review title: Did not work for my Beagle mix
Product review: I have a two-year-old Beagle mix who likes to bark at the neighborhood dogs and cats outside the window. I received this unit, installed the battery, and waited. Eventually, my dog started barking and the unit responded (the LED turns red when the unit emits a tone). My dog was not fazed at all, nor was my girlfriend's Bichon who was also in the room. Perhaps this unit works on other breeds and sizes of dogs, but it did not work at all on my dog.
