The ultrasound device is an electric tool designed to ward off dogs, which also includes a flashlight with LED bulbs. It can be used both for self-defense against aggressive dogs and for training your pet. It emits high-frequency sounds that only dogs can perceive, disturbing them to keep them away. It features different modes for repelling aggressive dogs and training purposes. Additional functionalities include a 2-LED flashlight and compatibility with a 9V battery (not included).