150db Double Tube Survival Whistle Lifesaving Emergency SOS Outdoor Camping Hiking Boating Hunting Fishing Features Sturdy but light Double tube metal whistle is loud and easy to blow. This emergency safety whistles can provide up to 120 decibels of sound, which can be heard for far distance. Made of aluminum alloy, lightweight and durable. Multipurpose double tube whistle This safety whistle is not only for camping, hiking, hunting, fishing, boating and other outdoor activities, also for dog training, school sports, competition, coach, etc.. Specification Material: Aluminum Allo Dimension: 0.6 x 2.2 inc Color: Black; Gold; Silve Package includes 1 x Emergency whistle