Dog Whistle Adjustable Pitch for Stop Barking Recall Training- Professional Dogs Training Whistles Tool for with Strap Lanyard 

Easy Training: Adjust frequency by turning screw rod inward or outward until your dog exhibits the strongest reaction. With the correct frequency you find, our dog whistle can ensure that your dogs obey basic skills after training.
Professional Dogs Training: Howan dog whistle allows you to easily train your dog/puppy unlimited commands such as stop barking, sit, come, and lay down, recall, toilet training and more.
Safety Dog Whistle: With heavy duty metal and hard plastic, Dog whistle is designed with compact size and comes with free black strap lanyard. It will not hurt your dog's hearing and also harmless to our humans.
Adjustable Frequency: Different dogs respond to different frequencies. Dog whistle produce a range of fund frequencies between 5.4 KHz and 12.8 KHz when you turned. The dogs whose ears are much more sensitive to this frequency, however it may not insignificant to human hearing.

Tips:
The voice of the dog whistle isn't silent, just quieter than you image. Many people cannot hear the sound of whistle clearly, BUT YOUR DOGS CAN. Dogs are far more sensitive to this frequency than humans. Don't worry about it.

Package list:
2pcs x whistle
1pc x rope