[SAFE] - This dog bark stopper does not use any harmful liquids 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. [Long Effective Range] - Equipped with an advanced 3-channel ultrasonic sensor with a power frequency of 20-25 kHz and an infrared laser, this ultrasonic dog bark deterrent can effectively repel dogs, cats, snakes, wolves and other animals within a radius of 6 m. [Dog Training Aid] - By combining the dual function of dog training and bark control, this dog training controller can effectively train your dog to stop unnecessary behavior such as barking, digging, eating dirty things or fighting refrain. [Versatile Use] - You can stop your dog from barking, stop your neighbor's dog from barking, train your puppy to stop barking, or stop dogs from barking while camping. [Multifunctional and Portable] - The portable tree deterrent is small, equipped with an LED flashlight, has