- Product Specifications: This set includes 18 high-quality whistles in 9 vibrant colors, with 2 whistles for each color. Ideal for travelers, hikers, campers, or anyone in need of an emergency signal. - Durable Material: Crafted from premium aluminum alloy, these whistles are waterproof and rust-proof. They are designed for longevity, resisting breakage, fading, and corrosion, ensuring reliable performance in any environment. - Powerful Sound: The unique sawtooth design enhances air vibration frequency, producing a loud, clear, and pleasant sound. This feature ensures your signal can be heard over long distances, making it suitable for various emergency situations. - Portable Design: Each whistle measures 4.7 cm in length with a diameter of 0.9 cm. Lightweight and compact, they come with a convenient loop for easy attachment to keychains or backpacks, ensuring you can carry them effortlessly. - Practical Use Cases: 1. Perfect for outdoor activities such as hiking or camping, where signaling for help may be necessary. 2. Useful for group events or sports, allowing you to easily get attention or coordinate activities. 3. Essential for emergency preparedness kits, providing a reliable means of communication when needed. These whistles offer a combination of functionality, portability, and reliability, making them an essential accessory for anyone who enjoys outdoor adventures or values safety in emergencies.