Emergency Whistle With Keychain

these emergency whistles uses aluminum alloy and metal keychain, durable and non-toxic material, not easy to break, fade or corrode, double anodized treatment Loud whistles: aluminum alloy outdoor survival whistle can make big and bright sound, which can be heard from a long distance, very useful for various emergency situations; When outdoor travel, you can confirm the direction for you, avoid getting lost, find companions, etc.