Vintage-inspired craftsmanship: This bosun's whistle features retro engravings and nautical elements, ideal for collectors seeking nostalgic pieces that celebrate oceanic tradition with elegance and authenticity. Material: Made of brass and copper, this bosun's whistle is crafted with excellent materials for robustness and adaptability to demanding and prolonged applications. High-performance warning: Produces an impressive 110-decibel sound through its engineered acoustic chamber structure, designed to transmit positioning signals quickly and effectively. Wide range of uses: Perfect for survival alert situations, it is suitable for hiking training activities and appeals to collectors of nautical memorabilia. Its consistent usefulness in multiple applications ensures intuitive handling and exceptional durability. Easy to carry: Designed to easily attach to a backpack, this bosco whistle combines convenient portability with minimal bulk, guaranteeing practical use without adding volume during travel or outdoor activities. Caution: Not suitable for children under 3 years. Use under adult supervision.