ACME Genuine Silent' Dog Training Whistle no. 535. Adjustable Frequency. Good Sound Quality. Weather-Proof. Designed and Made in the UK. Solid Brass (24ct Gold Plated)

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About This Adjustable Frequency 5400-12800Hz. Protective end cap. Designed with special air directors to tightly control the frequency produced and generates over a mile of sound w ith minimal effort. Quiet human audible sound to confirm the whistle is working. The whistle is engineered to produce a relatively quiet whistle sound audible in the human range the sole purpose of this is to reassure the user that a sound in the required range is being produced Includes information leaflet giving easy instructions. Solid Brass in a range of finishes. Genuine ACME Whistle made in the UK by specialists with over 150 years of experience. Show more