Made of aluminum alloy, the whistles are small and sturdy, can be hung on the keychain as an ornament conveninent to use, suitable size for your use and storage. This aluminum alloy outdoor survival whistle blows loudly, the ound is loud, can be heard from a long distance. Applied to travel outdoors or wild, it can confirm your location, avoid getting lost, find a companion, and provide assistance; it also can be applied in emergencies, referees, training, sports, students in school and so on. Improve your marketing campaign with this colorful and customizable emergency whistles
