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Smarter Paws Professional Ultrasonic Dog Training Whistle with Lanyard & Adjustable Frequencies & Free Training Ebook Guide!
Although I’ve never used ultrasonic whistle training ( I just talk to my Labradors and somehow they seem to know what I want ), there are people who swear by it.
The effectiveness seems to be that the sound carries further than a normal whistle and much further than a human voice, it also cuts through other sounds that may mask your voice. I’m told that this is one of the best whistles available plus it has a free guide, if you want to train your lab using this method then I recommend trying this package.
Do not blow an ultrasonic (or any) whistle close to your dog’s ears, it hurts!