DESCRIPTIONFeatures:Great to have for camping survival or great to give out at party’sCan be hung on the backpack, or hanging on the key ring, stylish and practicalWith partner in the wild to contact each other, in danger, unexpected need for helpOutdoor experts suggest that outdoor activities should be equipped with two life-saving whistles, carry one, backpack store 1, just in caseProduct use: can be used as an outdoor survival, training purposes, in the field of distress, field rescue survival whistleSpecifications:Length:45mmDiameter: 8mm(Key ring diameter 2.4CM)Material: Aluminum AlloyColor:Silver,Orange,Red,Blue,Black (send as random,if need the Specify color,pls leave a message)Package Included:1pcs Outdoor Survival Necessary Training Whistle (Reference: 17020010001) SKU: U17020010S04