ITEM NAME:1x Pet Dog Training Obedience Whistle Ultrasonic Supersonic Adjustable Pitch ne.Teach your puppy to be on their best behaviour with this essential dog training whistle. Part 1: Ultrasonic. Inaudible to the Human Ear, but very audible to the dog. Adjustable pitch - simply tighten or loosen the screw to work out your dogs frequency It should be noted that this whistle is audible to the human ear, essential for gauging its efficiency.
