Press the button when the dog misbehaves
Suitable for all dog breeds
When your dog starts doing the bad behavior, physically get in between them and whatever they’re doing wrong (couch, door, stranger, etc.) point the Barks No More at them and hold the button.
It will start playing a whistle sound that will get them to back away from it. After that just let go of the button and give your dog some kind of reward (treat, head scratches, etc.) so they remember good things happen when they aren’t being bad.