SUPER LOUD survival whistle: double tubes emergency whistle, high pitched powerful noise maker with dual sound chambers, can provide up to 120 decibel dB sound power, enough to be heard over a mile away. Cannot be overblown, works great as signal whistle.PEALESS DESIGN means no moving parts, nothing to obstruct sound, and nothing to jam, break or freeze. Lightweight and fail safe nice whistle works well in any conditions with excellent airflow design. Comfortable mouth grip, won't stick to lips like METAL ones in cold environments.ADJUSTABLE REFLECTIVE LANYARD and CLIP, high visibility even in the dark with ider button to adjust length around neck, long lanyards can easily loop through backpack, sailboats, camp hike gear, life jacket, kayak PFD, paddling paddle board, bike. You can also clip the whistle to your belt or shoulder straps for quick and easy use in case of emergency.SUPER DURABLE high impact ABS plastic construction ensures strong durability and complete waterproof moisture resistance. Premium quality whistles to carry for life safety, camping, hiking, backpacking, hunting, archery, fishing, swimming, boating, kayaking, marine sporting events any kind of outdoor activities, also for dog training.EASY-TO-REACH SERVICE, every purchase includes our worry-free warranty and lifetime support. If you have any questions, our friendly customer service team will be more than happy to help out.