🐶【Update Dog Bark Deterrent Device】The 2024 update Anti barking devices adopt the latest technology, with 3 variable frequencies modes (0~15, 15~20, 20~30KHz), compared to other dog bark Deterrent devices, our stop barking dog devices improves 2.5x deterrence efficiency, 2x faster training performance, and prolong the desensitization time of the dog to ultrasonic. If you or your neighbor's dog barks too excitedly, put it in the right spot and you'll have a quiet resting environment. 🐶【Effective & Powerful Anti Bark Device】Our engineers upgraded the ultrasonic speaker of the dog bark deterrent device, so that the ultrasonic bark stopper can emit powerful ultrasonic that make the bend flame, you can see the power of the ultrasound with the naked eye, which is not possible with other ultrasonic anti barking devices. Dog are very sensitive to this ultrasonic. So ultrasonic dog bark deterrent devices is very effective in getting your dog's attention, stopping barking or training your dog. 🐶【Safe for Dogs & Human】Most humane and used widely way to keep your dog or your neighbor’s dog from barking. Dog Barking Control Device no electric shock, no irritating smell, no beeping, safe for dog and humans. Perfect for keeping your dog quiet while you're away and creating a quiet environment for your family and neighbors. When using the indoor anti barking device for the first time, each dog has a different sensitivity to the ultrasonic , so please allow up to 2 weeks for training.