Color: silver, goldSurface treatment: oxidation + sandblastingPacking: individually packed in opp bagLightweight and equipped with a keychain for easy carrying;Survival whistle scope of use: Survival whistle does not have to be used when in distress, for example, say hello to the front and back, determine the approximate distance, determine the approximate direction of the other party’s sound source, etc.Material: Aluminum alloy materialProduct Name: High-frequency dual-tube survival whistlePeak volume: about 120dBSpecification: 5.5×1.5×0.8cmIt is made of aluminum alloy, and the surface adopts anodizing technology to make the color, does not fade, and has a longer service life.The product contains: 1X high frequency dual-tube survival whistleWeight: 13.5gLarger caliber, louder whistle, essential supplies for outdoor distress;