• Reliable and durable: made of plastic with nylon cord, they do not fray or fade easily. • Loud and clear sound: they emit a clear sound that quickly attracts attention. • Hanging design: each whistle comes with a comfortable cord to hang around the neck or on the wall. • Practical gift: convenient design for hanging, easy to carry and store. • Wide range of applications: suitable for referees, coaches, teachers, and more.