The whistle is crisp The sound is loud and crisp, you can quickly grab crowded attention whenever you want. you will not feel any slight pain in your mouth when using. Premium Quality Our whistle is made of stainless steel which ensures it is durable and easy to clean and you can use it without any worry. safe, durable and sturdy to use, much better than plastic. Free Your Hands We have equipped each stainless steel whistle with a soft nylon cord, which can free your hands and hang it around your neck easily. 41cm Lanyard. Whistle size 4.5 x 2cm Lightweight and convenient, easy to carry. suitable for most adults. Please check the size before purchasing. Wide Applications Suitable for referees, coaches, coaches, instructors, sports, lifeguards, teachers, self defense, survival, emergency, herd, bird or dog training, etc.