ACME Adjustable Silent Dog Whistle No. 535 (Silver Nickel-Plated)

Description Master your dog’s training and recall with total discretion using the world’s most famous adjustable silent whistle. Precision-engineered by ACME, the No. 535 Silent Whistle emits high-frequency ultrasonic waves that are clearly audible to dogs but virtually silent to the human ear. Crafted from solid brass with a stunning silver nickel plating, this fully adjustable tool allows you to perfectly fine-tune the frequency to match your dog’s unique hearing range—making it the ultimate solution for urban environments, late-night garden training, and close-quarters field control. Adjustable High-Frequency Ultrasonic Waves: Emits a specialized high-frequency pitch that cuts through outdoor ambient noises to reach your dog clearly, while remaining almost entirely silent to you and your neighbours. Precision Screw-Piston Tuning Mechanism: Features a fully adjustable screw-sleeve and piston setup that lets you dial in and lock the exact frequency to suit your dog’s unique hearing range, regardless of breed, size, or temperament. Multi-Dog Command Versatility: Because the frequency is fully customisable, you can easily adjust the pitch to differentiate specific commands or train multiple dogs independently within your pack. Solid Brass & Nickel-Plated Build: Precision-engineered in solid brass for a reassuringly premium weight and lifetime durability, finished in a sleek, polished silver nickel plating for an iconic, professional look. Advanced Internal Air Directors: Crafted with specialized internal air directors that support maximum, controlled sound output with minimal blowing effort, ensuring consistent cues every single time. Ideal for Urban & Late-Night Training: The perfect low-noise choice for late-night garden toilet training, busy town parks, or residential areas where you want to completely avoid loud, piercing whistle blasts. Complete Instructional Booklet Included: Arrives beautifully packaged with an authentic ACME guide booklet, providing clear step-by-step instructions on how to adjust the whistle and successfully condition your dog. ���� Iconic British Design & Sound Signalling Mastery A Tradition of Excellence Since the 19th Century: Established in Birmingham, ACME has spent generations refining the art of acoustic signalling. Trusted by professional dog handlers, gamekeepers, sports officials, and safety experts worldwide, every ACME whistle reflects a profound depth of technical knowledge shaped through long-standing practice and continuous, premium development.