1.Practical set: two whistles in the set allow for sharing by several people or serve as a practical replacement. 2.Loud and clear: the whistles produce a penetrating and clear sound that is easy to hear on the field or in large crowds. 3.EASY TO USE Equipped with a sturdy strap that allows for easy hanging and quick access. 4.Wide Application Ideal for referees and officials in various sports, as well as for use in physical education or children's play activities. 5.Material quality: made of high quality stainless steel, which guarantees a long life and durability. 6.WIDE APPLICATIONS Besides being used in sports, also great for training sessions, emergency whistle, school or outdoor activities. 7.Wearing comfort: the included strap ensures a high level of comfort and makes the whistle at hand at all times. 8.Durability: The robust stainless steel construction ensures that the pipes are not damaged even during intensive use.