Feature:1. Outdoor Bamboo joint whistle, less force to emit volume compared to ordinary whistle in emergency.2. Made of high‑quality stainless steel, mini, full materials and exquisite workmanship.3. Suitable for outdoor survival, self‑defense life‑saving, for EDC player collection, etc.4. Accompanying with hanging chain, you can carry it on nect, free your hands and lightweight.5. Suitable for outdoor actiuvities and also fit for lifeguards, and referees.Spec:Item Type: Survival WhistleMaterial: Stainless SteelColor: SilverTotal Length: Approx. 54mm/2.1inDiameter: Approx. 10mm/0.4inWeight: Approx. 23.0g/0.8ozOutdoor bamboo joint whistle, survival supplies in harsh environments, to ensure that you can use less force to emit a volume compared to ordinary whistle in an emergency.Package List:1 x Survival Whistle1 x Hanging Chain