A bark collar, as the name implies, is used to control your dogs' barking. The idea is if your dog starts barking, the collar will trigger an electrical shock through the collar to your dogs' neck. Hopefully this stops the barking. Th Best Rechargeable Bark Control Collars e collar works automatically, whether you are there or not, so you can be confident your dogs barking is being controlled all the time, night or day. Another advantage with this type of collar is the behavior feedback to your dog is immediate. It is not unusual for a dog owner to come home from work and find the neighbors up in arms about the dog's barking. But without a bark collar it would be too late to teach your dog that what he did is wrong.
https://petsaw.com/best-rechargeable-bark-collars/