ACME Genuine 'Silent' Dog Training Whistle no. 535. Adjustable Frequency. Good gound Quality. Weather-Proof. Designed and Made in The UK. Solid Brass

ACME original 'silent' dog training whistle no. 535. Adjustable frequency. Instruction leaflet included. Made in the UK. Good sound quality. Weather-proof. Solid brass with nickel plated finishAdjustable Frequency 5400-12800Hz. Protective end cap. Designed with special air directors to tightly control the frequency produced and generates over a mile of sound with 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 producedIncludes information leaflet giving easy instructions.Solid Brass with a Nickel Plated finish.Genuine ACME Whistle made in the UK by specialists with over 150 years of experience.