7-in-1 whistle consists of 7 small parts, including whistle, magnifying glass, lamp, compass, thermometer, reflector, and sealed tube. These 7 components are helpful when you are doing outdoor activities. The whistle can help you call for help, The compass can help you guide the way, A thermometer can help you understand the temperature, The mirror can tell the danger, The lamp can help you in the dark. At the same time, the Yoeseen whistle with a lanyard is convenient to carry.
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