【Effective Anti Barking Device for Dogs】Dog bark deterrent devices can stop your dog from barking excessively, so you can say goodbye to the nightmare of sleepless nights and constant disturbance caused by your neighbor's dog barking. It ensures effective and humane training both indoors and in a spacious outdoor environment, a barking deterrent designed to create a peaceful atmosphere for you and your neighbors. 【3 Adjustable Modes & Range Up to 50Ft】The anti barking device for dogs has three adjustable modes, suitable for dogs of different sizes and personalities. The bark box anti barking device has a range of up to 50 feet and can be used indoors and outdoors to stop dogs from barking excessively; it can also stop neighbor dogs from barking excessively when placed in the right position, and you will have a quiet resting environment. 【Safe & Friendly Dog Barking Silencer】Our dog bark deterrent devices uses ultrasonic technology to gently stop dogs from barking excessively without causing harm to it. The ultrasonic sound it emits is specially customized for dogs, which cannot be heard by humans or other pets, but dogs will feel annoyed and stop barking; our device ensures humane training methods and does not cause any harm to dogs.