1、Sturdy and Durable: Made of high impact resistance plastic material, the whistles is sturdy and durable, completely waterproof and moisture proof.2、Super Loud: The dual pipe emergency whistle with dual sound chambers can provide up to 120 decibels of sound power, enough to hear sounds from a mile away.3、Easy to Carry: With slider button to adjust the length around neck, and the long lanyard can easily pass through backpacks, sailboats, camp hike gear, life jacket, paddle boards, and more.4、Good Performance: The whistle is one piece design, there is nothing to obstruct sound and nothing to jam, break or freeze for good working performance.5、Widely Used: The emergency whistle is suitable for outdoor activities such as camping, hiking, hunting, fishing, swimming, boating, marine sports events, and can also be used for dog training.