This whistle is a good all-rounder, perfect for pet dog owners and professionals alike. It can be tuned to give your dog the best response. It is ideal for use in noisy environments but also great for recall over long distances._·     Can be tuned to give the best response from your dog·     Great training and command aid·     Ideal for use in noisy environments·     Great for recall over long distances·     Perfect for the pet dog owner and professional alike·     Materials: Iron 8%, Copper 92%