Description: 【Super loud survival whistle】Double tubes emergency whistle can provide up to 120 decibels, enough to be heard at long distance. 【Good Environmental adaptability】The whistle has no built-in pea, it will not mold or breed bacteria because of the pea.You can use it in any dust or dirty water environment 【Water-resistance camping whistle】Made of aluminum alloy, Anti-Oxidation,Strong and Durable.Can be used in all-environment,all-weather with excellent air flow design. 【Easy to Carry】The whistle is little and lightweight, with a key ring that can be hung on a strap or keychain. 【Multipurpose】Not only suitable for emergency situation in camping, hiking, trekking, cycling, hunting, boating and other outdoor activities, but also referee, coach, lifeguard, pet dog training, school sports, competition, etc. Specification: Material: aluminum Size: approx. 56x15x8mm / 2.2x0.59x0.3inch Package Includes:(4 Pack) 2 Pieces Emergency Survival Whistle