4-pack emergency whistle with adjustable reflective lanyard, rescue whistle, suitable for outdoor survival, hiking, camping, hunting, fishing, boat kayaking, life-saving, boat rescue signal (black) Loud survival whistle: 4-pack black double-barrel emergency whistles, loud and powerful tweeter, can produce high decibel volume, easier to attract others' attention, can be used as a rescue signal whistle in outdoor activities. Unique design: The emergency whistle has no internal parts, which means nothing can block, obstruct or damage it. The unique design allows our water whistle to float on the water and work well even in cold weather without sticking to your lips like metal whistles. Adjustable lanyard & sliding buckle: Safety whistle with reflective lanyard, easy to find even in the dark, long lanyard with sliding buckle, adjustable lanyard length, can be easily put around the neck, or the whistle can be attached to your pocket. Or wear it on your belt if you need to blow quickly in an emergency. Durable material: The rescue whistle is made of high-quality ABS plastic, which is lightweight and easy to carry, can emit loud sounds in all weather, has strong durability, and is waterproof and moisture-proof. Can be used as a survival whistle in harsh environments, or as a bear whistle to scare away other animals when you encounter them outdoors. Multifunction: The high-quality whistle can emit a loud sound and can be used as a safety whistle for outdoor activities, kayaking, camping, hiking, swimming, boating, hunting and other outdoor sports, and also as a survival whistle for self-defense, rescue, emergency survival, this safety whistle has dazzling colors and is very suitable for outdoor travel.