Widely used: This survival whistle is a great tool for outdoor activities, such as camping, fishing, hiking, hunting, life-saving in an emergency. Louder sound, double tubes can be heard up to 120 decibels, you can hear far away. Advantages of the emergency whistle: this emergency whistle has excellent airflow design, the surface is anodized for color formation, never fade, longer service life. And it has no moving parts, no soundproof parts, waterproof, can be used all day weather,rainy days, wet weather. Small and handy: small and lightweight, can be carried on your key chain, convenient and practical, can be attached to your backpack, belt if necessary Signal:If you lose contact with your friends in the mountains and the phone has no signal, you can whistle and then stay where you are, waiting for your friend to rescue. 100% high quality food grade stainless steel, safe, durable and sturdy to use. Trainer whistle with black lanyard to keep hands free. Suitable for referees, coaches, training, instructors, sports, lifeguards. Suitable for teachers, self-defence, survival, emergency, hats, training birds or dogs etc. Comes with a black lanyard that you can wear easily and comfortably. --Material: stainless steel. - Lanyard: Nylon - Sound: crisp and clear Box contents: 2 x Coach metal whistles with black lanyards. Quality: Each of our products is personally checked for quality. Guaranteed to not break under normal wear and tear.