Acme 535 Silent Dog Whistle - Adjustable Ultrasonic brand_-Sierra the Burma Pro MFS rewards

the Burma Pro MFS rewards proper care with years of reliable service

whatever the weather

hunting and fishing — where freedom of movement matters as much as practicality

while the boat-tail base steadies the bullet through its flight

it is equally at home in a game larder or utility room for anyone who prepares their own birds

Acme 535 Silent Dog Whistle - Adjustable Ultrasonic brand_-Sierra the Burma Pro MFS rewardsThe Acme 535 is the original ultrasonic gundog training whistle, made in Birmingham by J. Hudson & Co, the firm that invented the silent dog whistle. A screw piston mechanism lets you adjust it across a single variable frequency between 5,200 and 12,800Hz, so you can tune the pitch to suit your own dog and lock in a consistent recall note. To the dog the sound is loud and clear, carrying up to 1. 5km, yet it sits largely above human hearing, which is