1.Effective Bark Control – Bark deterrent device stops excessive barking with ultrasonic technology, ensuring peace at home and in your neighborhood. No more sleepless nights from constant dog barking 2.3 Adjustable Modes – This dog bark deterrent device has three adjustable modes, and you can choose the mode suitable for your dog according to the specific situation of the dog. The ultrasonic sound (up to 50ft range) ly discourages barking without physical . 3.Safe DogFriendly – Uses ultrasonic sound (inaudible to humans) to gently correct barking. Safe for dogs aged 6 months to 8 years, with no harm or discomfort. 4. Weatherproof – IPX4 waterproof shell withstands rain, snow, and wind. Perfect for indoor outdoor use—place this dog barking deterrent device in your yard, dog house, or living room.