Deluxe silent ultrasonic training whistle for dogs, Sprenger

Deluxe Sprenger dog training whistle used by training and hunting professionals. The sound of the whistle is practically elusive to the human ears, but the dog can hear it from a distance of up to 300 meters. The whistle is ideal for training and calling back the dogs from afar. The adjustment of the whistle is done from the screw. *The whistle training is necessary. Characteristics: - Ultrasonic whistle - German Brand - Plastic case included For hygiene reasons, the whistle is neither exchangeable nor refundable.