acme Double Tone Pipe No. 640/641 with free leather whistle strap

Frequency standard: the whistles from ACME are always 100% frequency standard, which means that the whistles always sound the same. The whistle can be used by you or another person, but the sound for the dog is always the same. Even if you lose the whistle, the new one will sound completely identical. Double tone: this special model can produce two tones. On one side is a trill tone commonly used for the stop signal and on the other side there is a whistle that in most cases conditions for recall. . Far-reaching: The far-ranging, consistent and loud sound is clearly audible even over long distances. The tones drown out even loud background noise or different weather conditions. Whistle strap: with the included leather whistle band, you can thread the strap through the opening and hang the whistle so you have the whistle quickly at hand.