Acme 535 Silent Dog Whistle - Adjustable Ultrasonic brand_-Sierra it is equally at home

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

marking their silver wedding with a hunt in the wild country of Zimbabwe

It accommodates shotguns with barrels up to 32 inches

for handloaders building their own

The exposed lead tip and tapered copper jacket give controlled

Acme 535 Silent Dog Whistle - Adjustable Ultrasonic brand_-Sierra it is equally at homeThe 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