YUYQA High Quality Aluminum Alloy Double Tube Super Loud Signal Whistles
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Premium Quality: The whistle is made of high-quality aluminum alloy material, which is durable, not easy to fade, and has a long service life.Moreover, its surface is smooth, not easy to stick dust, more practical than other materials. Waterproof and anti-rust.
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Emergency whistle, it can be used in all-environment all-weather, rainy day, humid weather with excellent airflow design, easy to whistle and make clear and maximum sound.
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Lightweight & Portable: The emergency survival whistle is about 10g, Lightweight and convenient to carry out. Easy to carry or attach to another key ring, belt, rucksack, backpack or wherever else you prefer to carry it.
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Application: The high-frequency dual chamber resonance whistle is a common outdoor supply, it is small and easy to carry. Good for use when out camping, hiking, traveling, fishing, hunting, boating, etc.
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Double Tube design, it is easily blown softly so that just the blast out a loud tone. You can save 30% energy than normal whistle. If you get separated from the group while hiking.