1. Good environmental adaptability - The whistle does not have built-in peas, so peas do not mold and breed bacteria. You can use it in any dust or sewage environment
2. Aluminum alloy material, anti-drop, anti-roll, durable, wear-resistant
3. No ball design, can be used in harsh environments, still work normally when entering the water.
4. Suitable for sports events, personal safety, camping, hiking, police, etc.
5. Easy to blow: scientific design, reasonable layout, let you blow the loudest sound in the most relaxed way.
WUZHONGDIAN Emergency Whistle Outdoor Emergency Whistle Survival Whistle Aluminum Whistle. Silver B07XF7TNHW