Dog Repellent and Trainer with Flashlight Ultrasonic Dog Deterrent and Bark Stopper Dog Trainer DeviceProduct DescriptionCSB21 Ultrasonic handheld dog repellent and bark control device is a high-tech electronic product that integrates training dog and lighting. The design is exquisite and easy to carry. It can be used as a professional dog training tool for effective training of dogs. It is also suitable for outdoor work. It is suitable for outdoor travel. It is especially suitable for those who are afraid of dogs for long-distance expulsion of all bad dogs, effectively to stop the dog attack. In addition, there is a certain driving effect on the wild wolf snake and rat pests.