Dog bark control and dog training. The dog bark deterrent device can emit 25KHZ ultrasonic waves, which is beyond the range of human hearing, but can easily get a dog's attention without harming your dog. This 2-in-1 training and anti-bark device has a working range of up to 82 feet. You can use it to effectively train your dog to stop barking, digging, eating unsafe food, fighting and other harmful behaviors. Of course, you can also use it to drive away evil dogs. Well-designed sonic design. This anti-bark device is ultrasonic designed for the hearing characteristics of dogs, making it easier for dogs to understand and learn. This barking control device can emit stable frequency and undulating frequency, and the special waveform greatly improves the training effect. With a dog clicker in the package, you can train your dog better. Convenient for outdoor use. This handheld dog dark deterrent is easier to carry. Its portable design makes the pet's gentle bark device suitable for indoor or outdoor use. Our ultrasonic anti-barking device comes with a wrist strap that fits comfortably in your hand. Dog training and barking control is not suitable for: aggressive dogs, hearing impaired dogs, dogs under 6 months or over 8 years old.