[SAFE] - This black anti-bark dog stopper does not use any harmful or chemical liquid propellants or sprays and is 100% safe for your dog or other animals or plants and of course for you and your family, your friends, etc. . [Large Effective Range] - Equipped with an updated 3-channel ultrasonic sensor with 20-25 kHz power frequency and infrared laser, this ultrasonic pest control device can effectively repel dogs, cats, snakes, wolves, etc. and other animals within a radius of 6 m/19.7 m. [Dog Training Assistant] - Combining the two functions of dog training and barking control, this dog training controller can effectively train your dog to stop unnecessary behaviors such as barking, digging, eating dirty things, or crawling. [Wide Use] - You can stop your dog from barking, stop your neighbor's dog from barking, teach your puppy not to bark, and prevent dogs from barking on camping trips. [Multifunctional Portable] - The portable tree repeller is small in size, equipped with a LED