1. Pea free design, reliable performance: Adopting a pea free structure avoids the problem of peas getting stuck or damaged in traditional whistles, ensuring stable sound under various harsh conditions.2. Bright colors, high recognition: Usually using bright colors such as orange and red, it has high recognition in outdoor environments and can be quickly detected even from a distance, improving the success rate of distress calls.3. Adjustable lanyard: Whistles with reflective ropes can provide high visibility even in the dark, and adjustable ropes can be easily hung around the neck, life jackets, kayaks, backpacks, camping and hiking equipment.4.Durable: Made of ABS plastic, it is lightweight, durable, waterproof and rust proof. Even in cold environments, it will not stick to your lips like m.5.Ultra high volume, strong penetration: This safety whistle can emit sharp and loud sounds, with a volume of over 120 decibels.