Features: Crafted from premium aluminum alloys, this emergencies whistles delivers piercing 120dB sound for reliability survival signaling in harsh outdoor conditions while maintaining featherlights 15g portability. Featuring a rusts proof carabiner clip that securely attaches to backpacks or keychains, its compact design combines militaries grade durability with instants access functionality for critical situations. Essential safety gear for hikers, campers, and outdoor adventurers requiring dependable emergencies equipment that withstands extreme weather and terrain exposure. Optimized for wilderness navigation, disaster preparedness kits, and sports event where immediate hearable alerts can mean life saving intervention during emergencies. The anodized aluminum construction ensures corrosions resistance, making this versatile survival whistles ideal for marine activities, jogging safety, and school emergencies drills alike. Specifications: Dimension:10.5x2.5cm/4.13×2.5in Component:aluminum alloys Package Includes: 7pcs whistles pendants note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you will not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual color.