[High Quality Materials]: the whistle is made of durable ABS, waterproof and durable, easy to blow. The appearance is simple and elegant, convenient and practical, and the safety factor is high. and also can be used for coach, teacher, sport, instructor, lifeguard, protection, self defense.

[High Quality Materials]: the whistle is made of durable ABS, waterproof and durable, easy to blow. The appearance is simple and elegant, convenient and practical, and the safety factor is high. and also can be used for coach, teacher, sport, instructor, lifeguard, protection, self defense.