Description: Do you want to stop your unwanted barking and bad behaviors of your dogs? Well, then why not getting this bark trainer under the principle of ultrasonic sound? When the device detect dog's barking then it emits an ultrasonic sound which can only be heard by the dog and the dog will stop barking. The high-pitched ultrasonic sound that is irksome to dogs and at the same time it is soundless to the human. It is fully harmless and safe to humans and dogs. Come and get one, you gonna love it!!! Features: Made of high quality material, tough and durable. Bright color and stylish design make it a great decor. Waterproof and portable suitable for indoor use and walking the dog outdoors as well. When the device detect dog's barking then it emits an ultrasonic sound which can only be heard by the dog and the dog will stop barking.The ultrasonic sound's effective range is up to 50 feet. The high-pitched ultrasonic sound that is irksome to dogs and at the same time it is soundless to the human. It is fully harmless and safe to humans and dogs. Specification: Condition: Brand new Material: Plastic Color: Black + White Battery: 9V battery Effective range: ＜50ft Size: 10.3 x 9.5 x 2.2cm / 4.1 x 3.7 x 0.9inch (Approx.) Package Included: 1 x Bark trainer