Acme 535 Silent Dog Whistle Lanyard The Acme Thunderer 58 is

The Acme Thunderer 58 is a well-known and widely used whistle

your whistling style and your choice of commands

5900Hz single frequency +/- 20% on blowing

The deep drake and higher hen mallard

a colourful member of the Crow family

Acme 535 Silent Dog Whistle Lanyard The Acme Thunderer 58 isNo "silent" dog whistle is truly silent. If it were, nothing would be able to hear it! The word silent is written in inverted commas because you can hear it, BUT only just. What your dog hears is really loud and travels up to 1. 5km. Adjustable through a wide range of frequencies using a screw piston mechanism enabling you to tune it to suit your own dog, this is the most versatile silent dog whistle that can be used with all breeds. A booklet is