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 - Color:Yellow and black. - Material: Plastic. - Size: About 13.60X3.80X3.30cm/5.34X1.49X1.30inch. - The carefully crafted whistle is very loud and clear, suitable for outdoor emergency use. - 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.