Dog Whistle Professional is the most comprehensive Dog trainer tool on the market.This app can be used to stop unwanted behavior, teach your dog new tricks or repel other dogs.With Dog Whistle Professional you can train your dog for multiple behaviours.Thanks to it’s unique presets system.How does it work?Dogs, unlike humans, can hear very high frequencies, (between 40 and 60 KHz).With Dog Whistle Professional you can take advantage of your dog