The ACME Silent Dog Training Whistle No

535 is built for clarity, reliability, and long-lasting field performance

Its sound is designed to carry without being harsh, and the frequency can be tuned to suit your dog and training environment

This makes it a flexible tool for a wide range of training scenarios, from casual sessions to more structured routines

Key features at a glance Adjustable frequency 5400–12800 Hz lets you tailor the tone to your dog and surroundings

Protective end cap guards the mechanism during field use and travel

Special air directors tightly control the frequency and help generate over a mile of sound with minimal effort

Quiet, human-audible confirmation signal reassures you that the whistle is producing the desired range

Designed with practical training in mind, the No

535 a balance of performance and ease of use

The audible feedback confirms operation without creating distraction for you or your dog, and the adjustable range supports experimenting with cues at different distances

Built to last and proudly British Solid brass construction with a choice of finishes, including a polished brass look for a premium feel and durable performance

ACME whistle made in the United Kingdom by specialists with over 150 years of experience

In addition to its materials, this whistle is engineered for -world use

The weather-proof design helps maintain performance across varied outdoor conditions, so you can train outdoors with confidence

It is a compact, hand-friendly tool that slips easily into a pocket or training bag for ready access during sessions

What you get and how to use it Each whistle ships with an information leaflet that provides straightforward setup instructions and practical tips for routine use

The combination of a robust build and clear, controllable tone makes it suitable for daily practice across different environments

Test the tone in a quiet space to confirm the audible range before outdoor sessions

Start training at close distance, then gradually increase the distance as your dog responds

Whether you are reinforcing basic cues or guiding your dog’s responses in more challenging settings, the ACME No

535 possibilities for tuning your approach

While results vary by dog and context, the tool is designed to support consistent, humane communication during training

FAQ Q: What makes ACME Silent No

535 stand out

A: Adjustable 5400–12800 Hz range, a protective end cap, and air-directors for precise tone; built in the UK for durability

Q: Is this whistle suitable for weather-exposed outdoor training

A: Yes

Its solid brass construction and weather-proof design deliver consistent performance in varied conditions