Description:This whistle you can use it when you are in a extreme environment or in a state of emergency that you can use less effort to blow the whistle to call for help. Through the polishing and pickling process, which can effectively protect the post, and not easy to scratch and oxidation.This survival signal whistle, great for outdoor sports, such as diving, camping, hiking, etc.Features:1. With great airflow design, it can easy to whistle and make a loud, clear sound.2. Compact size and portable mode, you can hang it on your bag or the key ring, very convenient to carry.3. The loud whistle can be heard for far distance, suitable for diving, camping, hiking, etc.4. An indispensable accessory for outdoor sports lovers and a unique gift to you friends.5. Available in 3 different colors, you can choose according to your needs.Specifications:Condition: 100% Brand NewItem Type: WhistleMaterial: NylonColor: Gray, Yellow and Green, Orange(Optional)Size: Approx. 7 * 2 * 1.5cm / 2.8 * 0.8 * 0.6inchWeight: Approx. 13gPackage Included:1 x Whistle1 x StringNote:The whistle is silent under water and is used for sea rescue.For different monitors, the color may vary slightly, thank you for your understanding.