1With great airflow design, it can easy to whistle and make a loud, clear sound. 2Made of high quality aluminum alloy, through the polishing and pickling process, which can effectively protect whistle body, and not easy to scratch and oxidation. 3Detachable design, built-in waterproof space can store paper strips and other small item. 4With a keychain, which allows the whistle to be attached to your key ring or hang on the neck. 5Great for outdoor survival, life-saving, self-defense, EDC collection, also for dog training.
