This is a high-quality and practical whistle. When you encounter an emergency in the wild, you can use the whistle for help. It uses high-quality plastic materials, is durable and will not rust or corrode easily, so you can use it with peace of mind. Features - Material: Plastic.- Size: About 15.00X3.80X3.30cm/5.89X1.49X1.30inch.- Note: no battery.- The carefully crafted whistle is very loud and easy to play.- It is made of plastic, sturdy and durable, with excellent texture.- It has a wide range of use and is suitable for outdoor activities, such as hiking, fishing, camping, and other sports.- The small and lightweight whistle is easy to carry and store, with a simple application method, and is a very practical tool.- You can give this simple and practical whistle as a gift to your friends and family. Pcking list: 1 x whistle