Two-tone ACME dog whistle 640

Two-tone ACME dog whistle 640

Classic dog whistle, with a constant frequency of sound, made of strong plastic. It emits a flat sound on one side, and on the other is a whistle with a ball. The whistle has a printed number, which allows you to purchase another copy, with exactly the same sound, to which your dog is accustomed.
Length 9 cm, weight 20 g.
Also available in orange, and black color.