Multi-purpose Anti-deformed Bright Anti-Cracking Emergency Whistle for Outdoor SportsSpecifications:You can use this whistle, which can make a clear sound and send signals to your travel companions because of its practical and high frequencies. It is a whistle function which is light enough, easy to carry and can be a beautiful keychain for decoration which is useful. Made of aluminum alloy material, it is long-lasting. The length of the whistle is 6.2cm and the width is 1.2cm. Suitable for personal or professional use. Item Name: WhistleMaterial: Aluminum AlloyColor: RandomFeatures: High Frequency, Multi-Function, Anti-wearSize Details:6.2cm x 1.2cm/2.44" x 0.47" (Approx)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Included:1 Set of Whistle (5pcs Per Set)