Each whistle comes with a lanyard, you can hang easily around your neck or on a wall mount when you dont need to use it, help you free your hands. The sound is loud and its sound can reach a long distance, you can quickly catch the croweds attention anytime you want. whistle can quickly catch the crowed attention, easy to make a loud sound with less air pressure and help you to remind others far away without approaching them. These whistles are suitable for referees, coaches, trainings, teachers, survivals, emergencies, games, competitiond, schools, gyms, etc. Different colors can fit your different preference.