[SAFE] - This dog bark stopper does not use any harmful liquid or spray propellants or chemicals and is 100% harmless to your dog or other animals or plants, and of course safe for you and your family, friends, etc. . [Large Effective Range] - Equipped with an updated 3-channel ultrasonic sensor with a power frequency of 20~25KHZ and an infrared laser, this ultrasonic dog bark deterrent can effectively repel dogs, cats, snakes, wolves and other animals within a range of 6M/19.7ft. [Dog Training Aid] - Combining the dual functions of dog training and bark control, this dog training controller can effectively train your dog to stop unnecessary behaviors such as barking, digging, eating dirty things or fighting. [Wide Usage] - You can stop your dog from barking, stop your neighbor's dog from barking, train your puppy not to bark, stop dogs from barking on camping trips. [Multifunctional Portable] - The portable tree repellent is small in size, equipped with LED flashlight, equipped with