回复：The dog barking has bother us for years.

Nobody know it, you use it in your house when you heard dog barking, it sell on amazon, so it should be legal. Sometimes it is the dog owner 's fault not to stop dog barking, the dog need to be trained when they behave bad. Sometime the owner know it and they just don't know how to correct. You can read the review from amazon for those dog barking controll device, it cost 20 or more than 100, ....it may not work on some dogs...my dog always jump on my fence when he saw other dog passing by, if i say no, no ,he would not listen, but when I put a shocking collar on he behave like a gentle man. And also he even knows whether then device is on or off.