The ACME 211.5 dog training whistle, a perfect addition to any trainer's toolkit, offers a medium high single note perfect for larger dog breeds. Made from BPA-free plastic, it guarantees superior sound quality and durability. Its Baltic Blue color not only adds a professional touch but also makes it highly visible in various settings. This whistle emits a clear and powerful sound, reaching distances of up to 100 yards, making it ideal for training during group dog runs or in large open spaces. Its genuine English manufacture ensures superior craftsmanship and longevity. Experience the power and convenience of this whistle today, and train your dog like a pro!