DreamInn Portable Emergency Whistle Hiking Camping trekking Brass Survival Signal Whistle Skull Keychain Loud Whistle 1. brass emergency whistle is pocket size and light weight for daily use. 2. Survival Signal Whistle, great for outdoor sporting events, outdoor camping, hiking, trekking, boating and so on. 3. Looks like little item,but potentially important one, this Emergency Whistle & Keychain could be a life-saver.A Very Nice Aluminum Emergency Survival Whistle Key Chain. 4. Pure handmade brass whistle for creative human skull design, light weight and convenient to carry. 5. Not only a Survival Signal Whistle for outdoor, but also a keychain and necklace, a wonderful gift for you and your male friends, Match with suitable apparel for different occasion.