Pipe support a neutral training because emotions are not transmitted via a pipe. Metal pipe is available in different versions: as a high-frequency whistle or whistle. In the training of dogs are very popular high frequency whistle. For the dog high frequencies are much better to listen than to humans. A sound from this whistle is always a clear signal, unlike a voice that sounds always different. Another advantage for the use of this collection is that the environment is only slightly disturbed. The frequency is adjustable. Sturdy metal design.
High-frequency whistle L: 5 cm silver