EFFECTIVE ANTI-BURNING DEVICE. With the latest ultrasonic technology, the dog trainer is suitable for dogs of all breeds and sizes. The safest and most humane way to stop your dog and your neighbor's dog from barking! It can be used as a dog repellent device and a dog training aid tool to stop bad dog behavior such as endless barking, digging and fighting. SAFE AND FRIENDLY FOR DOGS AND HUMANS. Using the latest ultrasonic technology, this bark stopper is harmless to dog's hearing and will not cause physical harm. The facts have proved that the sound frequency between 25-30Khz cannot be human heat. It can easily attract dogs' attention and improve their bad behavior. Consistent training is necessary to achieve effective and lasting results. SUPER EASY ONE-CLICK USE. Whenever your dog does anything wrong - barks, pulls on the leash, jumps, etc., just press the button and point the ultrasonic dog training clicker directly at him. Different dog breeds may react differently to the sound of ultrasound. For best effect, once dogs stop barking or engaging in unwanted behaviors, please praise and reward them, so they understand what we expect of them. PORTABEL SIZE FOR INDOOR AND OUTDOOR USE. This dog bark control device is lightweight and small in size, and can even be easily placed in your jeans pocket. You can wear it at any time to intensively train your dog. It is very suitable and practical for outdoor and indoor use. USB RECHARGEABLE DOG BARK DETERRENT. Comes with the USB cable, the bark stopper can be fully charged in 5 hours, and our dog barking device can work continuously for 15 days.