Features: Brand new and high quality Good Quality Material: The whistle is made from good quality aluminum alloy material, outside anti-oxidations treatments, no fading, no rust and durable, waterproof, rust-proof, can be used for a long time. Easy to Use and Carry: This aluminum alloy whistle is small and portable, these whistles with a keyring, compact and strong, elegant personality, can be hanging on the keyring as an ornament, portable designs, easy to carry around. Loud Whistles: The designs of the whistle increases the vibrations frequency of the air, the high frequency is louder, and the transmissions distance is long, very useful for various emergency situations; During outdoor travel, you can confirm the direction for you, avoid getting lost, find companions, etc. Multi-purpose: Emergency tools aluminum alloy safety whistle for a variety of occasions, not only suitable for emergency situation in sporting event, such us camping, hiking, boating, hunting, but also used as referee coaches whistle for tournament, or pet training. Service: Your satisfaction is our priority, please rest assured to purchase our product. If you are not satisfied with our product or have any questions, please to contact us. Specifications: Material: Aluminum Alloy Color: Random Color Package Weight: approx.25g Length: approx.4.6cm/1.81in (More Size Detail, Please See Photo.) Package Includes: 6Pcs Lifesaving Whistles note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!