- Silent dog whistle by Acme with adjustable frequency to suit your dogs hearing
- Almost inaudible to humans
- Great training aid
- The whistle can be heard by dogs up to 400 yards
- Supplied with instructions
- Acme is the leading quality brand for whistles - made in England
- Solid brass construction with nickel plating
- To adjust the frequency screw the bottom of the whistle away from the top and then lock the position in place with a small screw driver.
This is a genuine made in the UK Acme product (model no. 535).