Tried this device on several dogs and it had no effect. The advertising leads you to believe it will stop any dog barking, it doesn't. It is a cheap piece of plastic made in China with a couple of useless lights in it. Be careful if you order as there is a tab that is well-positioned for you to accidentally hit and end up with a pair of nail expensive clippers. Ended up paying AUS $71.00. Should have used a rolled-up newspaper on my hand, works better.
Bottom Line: No, I would not recommend this to a friend
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