This anti bark device is used to prevent dog attacks, issue ultrasound to repel the dog or wild wolf. In normal situation, it can be used as a normal flashlight to illuminate at night. Ultrasonic wave reaches up to 125 db. Audible to dogs but not to human. This device effectively target animals up to 20 m away. Can also be used as dog training device.

The first gear is a flashlight, the second gear is a Training dog, and the third gear is Drive the dog.