unknown. Stop Annoying Barking - Blue Handheld Ultrasonic Bark Control for Dogs New

Anti Barking Device,Dog Barking Control ,Rechargeable Ultrasonic , Blue New I have not if this item- as a product, works. It's supposed to use Ultrasonic waves to make a dog stop barking. I don't know if that's real science or not. But item is new on box.