General description This Black Portable Ultrasonic Dog Repeller with LED Bark Stopper is designed to be a safe and effective solution for controlling barking and training dogs. It operates without harmful liquids, sprays, or chemicals, ensuring safety for dogs, other animals, plants, and humans. Technical specifications Ultrasonic frequency: 20~25 kHz Effective range: up to 6 m / 19.7 ft Battery: 1000 mA rechargeable polymer battery Size: Portable and compact Usage Stop your dog from barking Prevent neighbor's dogs from barking Train puppies not to bark Control barking during camping trips Other information Equipped with an LED flashlight Can be used for outdoor work, travel, shopping, and security patrols