Strong Dual tube design, provides louder sound, can be heard from a distance. The twin tube emergency whistle can deliver over 100 decibels, enough to be heard long distance. . Emergency Survival WhistlesThe whistle features a bold, crisp sound, no moving parts, nothing to obstruct the sound and nothing to jam, it keeps you well noticed in an emergency. It is very necessary to carry a portable whistle for your safety. . Bright colors Very visible, useful in search and rescue situations. Thanks to its bright orange color, you cannot lose it easily. Color also represents urgency. You and your orange whistles will be noticed easily in any situation. Perfect for rescuers, self-defense and emergencies. . VersatilityA good item for daily life needs, not only suitable for emergency situations at sporting events. Loud safety whistle for camping, hiking, hunting, fishing, boating any kind of outdoor activities, also for dog training. .