2pc Emergency Whistle with Keychain, Metal Whistle Pendant Keychain Outdoor Camping Hiking Survival Whistle Training Good Quality & DurableEmergency survival whistles keychain are made of premium aluminum alloy.It is durable for wear resistance. PortableThis aluminum whistle is small and portable, with a key ring which can be attached to a lanyard or a key. Super loud survival whistleAluminum alloy outdoor survival whistle can make big and bright sound, which can be heard from a long distance, very useful for various emergency situations; During outdoor travel, you can confirm the direction for you, avoid getting lost, find companions, etc. Exquisite appearanceEach emergency whistle is equipped with a round key chain ring, compact and strong, elegant personality, can be hung on the key ring as an ornament, portable design, easy to carry around. Wide UseVery suitable you can carry it when camping, hiking, hunting, fishing, boating and other kinds of outdoor activities.Also is a signal whistle for coaches, referees, linesmen and animal trainers. sizeSpecifications: without ring length 46mm* whistle outer diameter 8.7mm, key ring diameter 22mm Weight: 4g/pc. colorpurplesilvergreengoldlight bluedark blueredrose redblack. pack*2.