ACME 535 Silent Dog Whistle with Lanyard - Nickel Plated - Adjustable Frequency - Inaudible to Humans - Over 1.5km Range - All Breeds - Made in England

• ADJUSTABLE FREQUENCY SILENT DOG WHISTLE: The ACME 535 produces a tone humans can barely hear, yet travels over 1.5km. Adjust frequency via the screw piston mechanism to find the precise pitch your dog responds to best. Special air directors tightly control the frequency, generating maximum sound with minimal effort. Suitable for all breeds and all training levels.
• FOR ALL BREEDS FROM PUPPIES TO WORKING DOGS: The adjustable frequency makes the ACME 535 suitable for any breed, from puppies learning recall to established working dogs. Owners, trainers and handlers use the 535 to train discretely in public spaces without disturbing bystanders. For dolphins, the 535 has also been used in professional marine animal training.
• NICKEL PLATED FINISH WITH LEATHER LANYARD: This listing is the nickel plated ACME 535 Silent Whistle with 107 brown leather lanyard. The nickel plated finish provides a bright, durable surface with long-lasting corrosion resistance. Suitable as a functional training tool or as a quality heritage gift. Presentation box versions available in silver and gold plated finishes.
• PAIRS WITH A BROWN LEATHER LANYARD: This listing includes the ACME 107 brown leather lanyard for secure neck carry. For a complete recall and positive reinforcement system, pair with the ACME 210.5 or 211.5 Alpha for audible commands, and the ACME Clicker 470 for marker training. All available from ACME's full range of British-made training accessories.
• ART DECO DESIGN, MADE IN ENGLAND SINCE 1870: The 535 form was conceived by Clifford Hudson, son of ACME founder Joseph, drawing on Art Deco styling. Solid brass construction designed to last decades. ACME has manufactured whistles in Birmingham since 1870. Five generations of family ownership. Used by professional trainers and handlers worldwide.
• HOW TO ADJUST AND USE THE 535: Screw the piston in or out to change the frequency. Test each setting with your dog and note the position that produces the strongest recall response. Use short pips for recall once the correct frequency is found. The brown leather lanyard (included) provides hands-free carry. Comes with printed instructions and training guide.
• NICKEL PLATED, BROWN LEATHER LANYARD: The 107 brown leather lanyard provides a natural, durable neck carry option. Nickel plated brass construction gives a bright, lasting finish. Available in antique brass, polished brass, silver plated, rose gold and gold plated versions from ACME's prestige range.
• COMPLETE YOUR TRAINING SYSTEM: The 535 Silent Whistle pairs with the ACME 210.5 or 211.5 Alpha for a combined audible and silent recall programme. Add the ACME Clicker 470 for positive reinforcement marker training. The 535 is also available in nickel plated, polished brass, silver plated, rose gold and gold plated finishes in the ACME prestige range.
• SOLID BRASS CONSTRUCTION, ART DECO HERITAGE: Made from solid brass to an Art Deco design by Clifford Hudson, son of ACME founder Joseph Hudson. Still produced using original tooling at the Birmingham factory. ACME has manufactured from the same site since 1870. Five generations. A whistle built to last a lifetime. Presentation box options available.
• CARRIES OVER 1.5KM, INAUDIBLE TO HUMANS: Special air directors generate a sound that travels over 1.5km with minimal breath effort, while remaining virtually inaudible to the human ear. Solid brass construction withstands decades of daily use. Optional engraving available. Available in nickel plated, polished brass, antique brass, silver, rose gold and gold plated finishes.

Product Description The ACME 535 Silent Whistle produces a sound humans can barely hear, yet travels over 1.5km. Adjust the frequency using the screw piston mechanism to find the precise pitch your individual dog responds to best. Special air directors tightly control the frequency output and generate maximum sound with minimal breath effort. This listing is the nickel plated finish with ACME 107 brown leather lanyard. Includes ACME 107 brown leather lanyard. Comes with instructions for adjustment and a training guide. Suitable for all dog breeds from puppies to established working dogs. Used by professional trainers, pet owners and handlers who require discrete recall commands in public spaces. The 535 has also been used in professional marine animal training. The 535 form was conceived by Clifford Hudson, son of ACME founder Joseph Hudson, drawing on Art Deco styling. Solid brass construction designed to last decades. Optional engraving service available. ACME has manufactured from its Birmingham factory since 1870. Five generations of family ownership. The world's most trusted silent dog whistle. Genuine ACME. Made in England. Always original. Directions With its adjustable screw piston mechanism, this whistle enables precise control over a wide range of frequencies, allowing you to tailor it to your dog's unique hearing range.