Double tube emergency whistle, aluminum whistle The whistle is not just an emergency, it can be used for camping, fishing, hiking, travel. You can place it in any emergency kit. You can use it to scare animals, when you worry that dogs may bite you, it is very useful. If you find yourself floating in the sea, you can use it in earthquakes and landslides if you are lost in the wilderness Feature: The whistle is made of aluminum alloy to ensure durability and service life. It is very light, only 12g, small size, easy to carry. More loud, the maximum sound is 150db. High frequency whistle, loudly hear the distance of the sound. Waterproof, can be used for any dust or rain. You can put it in the backpack, very stylish, practical and portable.
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