Are you troubled by your dog suddenly barking out?? Introducing an item that can be used with confidence to train your beloved dogs "unnecessary barking". "Pepawn! " will react to those unfamiliar dogs. Daily sounds such as "loud and sound" that you hear suddenly outside, "TV sound" and "vacuum sound". It is very important until your dog gets used to it. But the owner and dog are hard to get angry every time. The "Doggy Silencer" is very convenient for those situations, and it reacts to the voice of your dog barked and activates it with ultrasonic waves. Ultrasonic waves are harmless to dogs, and can be used with confidence. When your dog barks, the sensor reacts and emits an unpleasant ultrasonic wave for your dog. for a bit of harmless shock therapy. Ultrasonic waves with 3 levels of sensitivity adjustment: You can switch between low, middle, and high to match your dogs response and the case of your dog. Basic tests show effective for small dogs, medium dogs, and large dogs. However, because each dog has its personality (individuality) so some children who do not care about ultrasonic waves... (laugh) say "My dogs have a lot of wasted barking and is a must-have item for a try. Then, if you stop barking your dog.