I received CLD Brands Outdoor Camping Emergency Whistle in return for my unbiased review. This is a compact yet sturdy whistle. It has 7 different features. This whistle comes with a nylon hang rope and hangs comfortably around the neck. It's compact enough to keep pretty much anywhere. This is a great whistle for any outdoor activities-- hiking, camping, bike riding, walking, etc. The whistle is easy to use. It comes apart easy and is simple to put back together. It has a built in compass and thermometer. The compass is easy to read and the thermometer is very accurate. When unscrewed, it's a magnifier and a reflector. It also has a LED flashlight. This is a very nice outdoor multi-purpose tool. There's also a free Survival guide E-book included. Overall, a very nice product. You can check out more about CLD Brands Outdoor Camping Emergency Whistle @ http://www.amazon.com/gp/product/b00w0d0ece.