Feature: 1. Portable Design: Small and portable, it is not easy to be found in the palm of your hand. It will attract the attention of everyone when you use it. 2. Party Game: Bird whistle does not even affect the language of the mouth, and it is a great accessory to liven up the mood, whether it is a family gathering or party. 3. How to Use: Place it on your tongue with the crescent shaped film pointing outward. Let the whistle get wet in your mouth. Once wet and pliable, push it to the roof of your mouth with your tongue and make a bird call. 4. Easy to Play: Takes just a little time to practice mastering the use of the bird whistle, and then you will be a moving focal point that you will showcase yourself anytime. 5. Perfect Gift: Toy parts are small, not suitable for children under 12 years old. You can give them as gifts to your family and friends on special days. Specification: Item Type: Bird Caller Tongue Material: Metal. Package List: 5 x Bird Caller Tongue Note: This product is only a tool, need more practice to master the skills, and whistling similar, each person blowing out the sound of each characteristic, not everyone can blow.