Usage Tips:Quantity: There are 24/48 colorful whistles in the package, the colors are various and the whistle is loud, you can use it as a party gift bag or teaching tool, the number is enough for your needs.Material: These whistles are made of plastic and metal balls, the material is light and durable, the sound is crisp and loud, not easy to damage, and has a long service life.Feature: This whistle is equipped with a lanyard of the same color, you can hang it around your neck and use it, and it is also easy to hang, which is more convenient to use and not easy to lose.Function: The whistle allows you to easily make a loud sound, which can be used as a party toy to liven up the atmosphere, and can also be used as a pet training prop to issue instructions, it is a very practical prop.Application: The colorful whistle is practical and easy to distinguish, you can use it for game grouping, it is more interesting, and its loud sound is also suitable for physical education classroom teaching.