ITEM NAME:Dog Whistle Stop Barking Ultrasonic Sound Repeller Train With Strap JR #aucsearchbutton #aucsearchbutton:hover { cursor: pointer;.Adjust the pitch & blow the whistle to your dog. Even dogs can†²t hear all frequencies. Wait until he is asleep and gently blow on the whistle. Your whistle has a nut and screw that adjust the frequency when turned.
