This super loud whistles made from premium stainless steel allows you to command attention from half a mile with just a soft blow! Each whistle comes with a black lanyard, you can hang easily around your neck, or on a wall mount, help you free you hand. The whilstle with black lanyard is suitable for referees, coaches, training, instructors, sports, lifeguards, teachers, self-defense, survival, emergency, herding, training bird or dog, etc. Color：Silver Size：1.77"*0.78"*0.71"