Damomon Extra Loud Stainless Steel Whistles with Lanyard, Good for Referee, Coaches, Training, Instructor, Sports, Lifeguard, Protection, Self Defense, Survival, Emergency, etc Each whistle is guaranteed to be LOUD every single time, with a bold crisp ear puncturing sound that will get anyones ATTENTION Great for all purposes, lifeguard, survival, coach, referees, emergency Very Strong Stainless Steel Whistles Hand held whistles that will hang from you neck as a necklace with the nice lanyards that are included. Fits anyone and adjust length