Other shops wanted in excess of $40 for a whistle. This works fine and is cheap
I have 2 German Short Haired Pointers and they are happy to go for long walks but can be distracted easily. They will also run off in one direction towards other dogs etc....we trained them to this whistle and the results were awesome. It takes all anxiety away thinking the dogs won't return as this whistle hasn't let me down yet. It is worth every cent as it makes my walks with the dogs more enjoyable and manageable; it also demonstrated that I can control them in an off leash area by filming their recall to this whistle.