Acme Silent Training Whistle
The Acme Silent Whistle is almost inaudible to the human ear, its ultrasonic frequency will carry over great distances. It offers an adjustable frequency device, enabling the frequency to be adjusted over a range of 7400 hertz. It also has a locking screw enabling the chosen frequency to be fixed once selected.
This silent dog whistle is a quality metal whistle made by Acme in England for many many years specifically for dogs. According to the manufacturer, this silent dog training whistle is effective up to 2 miles depending upon wind, weather, terrain etc.
Full use and training instructions included.
Made in England
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