Features: 1.Material:Aluminum. 2.Weight:1.27oz. 3.Length:2.41" Dia:0.43". 4.Color:Red/Green/Blue/Silver Assorted colors available. 5.Great for emergencies, survival, or disaster preparedness. Note:Colors send random! Description: 1.Loud whistle, great for sporting events, camping & hiking,boating. 2.Key ring for attachment to a lanyard or keys. 3.Great for boating, camping, hiking personal safety, and geocaching. 4.A little item,but potentially important one, this Emergency Whistle & Keychain could be a life-saver. 5.Brightly colored easy to find it when you need it. Package content: 4 x Aluminum survival whistle(Assorted colors)