Ultrasonic whistles
Whistles with frequency regulator.
They emit very sharp sounds, perceived from afar by the dog, but which are almost inaudible to humans.
Less annoying whistles.
The quietest.
Several measures-powers.
Whistles with frequency regulator.
They emit very sharp sounds, perceived from afar by the dog, but which are almost inaudible to humans.
Less annoying whistles.
The quietest.
Several measures-powers.