Stainless Steel Whistle Outdoor Emergency Life-saving Whistles Traffic Command Training Sports High-frequency Whistle Referee

Applicable:1. Seeking help and warning - suitable for outdoor exploration, women, lonely hikers, children, and maritime rescue2. Warning, Command - Traffic Police, Security, Vehicle Dispatch Management, etc3. Outdoor communication - (traveling together, one person per person, pre coding the flute sound, and then allowing for long-distance communication), suitable for outdoor sports4. Competitive competitions - suitable for various sports competitions for referees5. Other uses that can be utilized independentlyFeatures: sturdy and durable, dual tone sound, unique and loud sound. The volume of your lung is as high as your lung capacity. The hanging rope type has high strength, is easy to carry, avoids loss, and can be inserted into other items such as keys