The ACME 212 Pro-Trialer is a versatile, medium-pitch training whistle designed for precision and consistency. Its steady frequency remains unchanged no matter how hard you blow, ensuring your dog always recognizes its unique signal.

Ideal for long-distance training, this whistle cuts through distractions, making it especially effective for retrievers, pointers, setters, Labradors, and most terriers. Whether you're working in heavy cover or fine-tuning obedience, the 212 helps minimize confusion—perfect for maintaining control during trials and handling more stubborn or independent dogs.