【Safe & Friendly Anti Barking Device for Dogs】Our dog barking silencer uses ultrasonic technology to stop excessive barking without harming your pet. 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. The humanized design ensures that dogs learn to control excessive barking without any harm. 【3 Adjustable Modes & Range Up to 50Ft】The dog bark deterrent devices has three adjustable modes, and you can choose the mode suitable for your dog according to the specific situation of the dog. The bark box anti barking device can emit ultrasonic waves with a range of up to 50 feet to stop dogs from barking. It can not only be used indoors, but also ensure effective training even in spacious outdoor environments, and it can stop neighbor dogs from barking. 【Effective Dog Bark Deterrent Devices】Anti barking device for dogs 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 is not only an effective and humane way to stop your dog from barking excessively, but also a barking deterrent designed to create a peaceful atmosphere for you and your neighbors.