New Metal Ultrasonic Silent Recall Dog Training Whistle For Stop Barking

This whistle can quickly train your dog to stop barking and follow simple commands. 

The Dog Whistle is light, compact and has a strong rigid construction. 

Adjust the frequency rod until you find the frequency your dog responds to and simply use the locking nut to lock in the frequency. 

Ultrasounds are frequency vibrations that are too high (acute sounds) to be audible to man. 

However, they can be heard by dogs. Unscrew the upper part of the whistle to increase the frequency.