Works

Seems to work, we have 3 different brands in the back yard. Our neighbors have 3 dogs that bark all day and all night. The first one we bought helped but didn't stop it. This is the 2nd one we got and they have to bark louder to set it off but it bothers them more when it does trigger it. When it goes it bothers them much more and stop barking. The third one we bought was a plug in kind and between the 3 of them we get much more peace and quiet on the back deck

###

