❀It is used for training of own parrots, pigeons and other birds and dogs to make your pet more obedient ❀This whistle is made of high quality brass, strong and durable, and can be used for a long time. ❀The key component of the whistle is also made of pure copper, which will never deteriorate and all are loud. ❀Easy to carry,small size, can also be hung on the key ring, not easy to lose ❀More functions:It is not only your training whistle, but also your outdoor emergency whistle, more practical.