This Whistle can help you to train your dogs.Using this whistle produce ultrasound and spread very far.so the dog can be very far away hear the sound.
If you want your dog to come when the whistle is blown, start by blowing the whistle when your dog is in another room. Start training your dog to respond to the whistle like you would any other command.
Adjust the pitch & blow the whistle to your dog. Even dogs can hear all frequencies.Wait until he is asleep and gently blow on the whistle.
Ear of dog to receive sound waves per second, 120 kHz, while the people can hear up to 20 kHz.Dog whistle will send a dog can detect ultrasound.
Dog whistle with the dog (can also be used for other pet birds such as pigeons)to establish a good tool for communication and discipline.