Super Dog Whistle

Do you have a dog? Dog Whistle can train your dog! Whistle when the dog does something bad. Teach your dog new tricks, no barking and better behavior!
You can also use it as anti dog repellent whistle.

You probably can’t hear a dog whistle because the frequency is too high. Dogs hear higher frequencies better than people do. That’s why dog whistles seem to be silent. High frequency sounds usual travel further than voices.