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Review title: Worthless Gadget!
Product review: We have a Boston Terrier who barks constantly when playing ball----so we bought two of these units; one each for upstairs and downstairs. She's really too small for a bark collar so we tried these.Since the signal is ultrasonic, the only way you know when the unit is working is a red light flashes when activated. While our dog barks loud enough you can hear her in the house while sitting outside with the front door closed, the PetSafe won't work even as close as 4 foot away.Simply put, it's not sensitive enough and there is no way of adjusting the sensitivity.We've been round and round with the manufacturer, who has offered no solutions.Highly recommend against anyone buying one of these units. They're a waste of money.
