This versatile aluminum survival whistle is for a variety of outdoor activities. Its high-frequency double tube design produces a loud, clear sound that can be heard over long distances, making it ideal for signaling in emergencies. Features -Color:Silver -Material:Aluminum Alloy -Size:4.00X1.70X0.90cm/1.57X0.67X0.35in -Durable aluminum build: made from aluminum alloy, this whistle is built to withstand the rigors of outdoor use while remaining lightweight -Dualtube efficiency: the dualtube design amplifies the sound, making it loud and clear enough over long distances, crucial for survival situations -Safe design: the construction ensures the whistle won't jam or freeze, providing reliable sound production in any weather condition -Ideal for pet training: this whistle is for training pets, offering a consistent and clear sound that can be used for and recall -Keychain convenience: the integrated keychain attachment makes it easy to carry the whistle with you at all times, ensuring it's always accessible when needed Package list: 1 x survival whistle