TRAIN AND REPEL Using the latest ultrasonic and sonic technlogy, this dog repeller produces a discomforting but not harmful, high frequency sound, audible to dogs. Point the Laser beam and pull the trigger to blast up to 50 feet away helping stop the approach of unwanted dogs. Two settings: DOG or CAT. A wonderful tool for training dogs from barking and unwanted behavior or great for repelling animals and cats. This ad has had 3,561 displays and 148 readers