ACME Europe ACME - Model 535 Nickel Plated Silent Dog Whistle

No whistle is completely silent.
What your dog hears is really loud and extends up to 1.5 km. The whistle has a wide range of frequencies using a mechanism that allows you to tune it to your own dog. This makes this whistle the most versatile whistle that can be used with all breeds. A booklet is provided with the whistle which contains a simple guide that provides easy guidance on adjusting the whistle and training your dog.
Solid brass that lasts for decades.
This is the ultimate dog training whistle