Product name:whistle Product size about : 6.2*1.15cm/2.4*0.4in Product color: As shown in the figure Product material:Aluminum Alloy product features: 1. High-quality aluminum alloy material: Made of high-quality aluminum alloy, it is light and sturdy, not easy to rust, ensuring reliable use in various environments, suitable for outdoor activities and emergency needs. 2. Portable design: The compact keychain design makes it easy to carry with you, easily hang on a backpack, key ring or belt, and be ready to respond to emergencies at any time. 3. Treble penetration: The whistle emits a crisp and loud sound with strong penetration, which can be heard from a long distance, helping you to quickly attract rescue attention in an emergency. 4. Multi-functional use: In addition to rescue and disaster prevention functions, this whistle is also suitable for outdoor adventures, hiking, camping activities, etc., to ensure your safety and smooth communication. 5. Fashion appearance: The modern and simple appearance design is fashionable and practical. It can be used as a survival tool and a personalized accessory, which is very suitable for users who love outdoor activities. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can contact us at any time. We will give you some suggestions, but for your reference only. Shipment includes: 7 pc whistle