4-function whistle is a useful multi-function device. Features 4 key functions that are helpful in navigating the outdoors. Includes a compass for finding your direction and when getting oriented. The built-in whistle is loud enough to alert others of your presence. On the back of the whistle is a thermometer that accurately tells the temperature with readings in both Fahrenheit and Celsius. Inside is a magnifier that is useful for reading maps or viewing details on items. Also includes a convenient clip to attach to a zipper, belt, lanyard, or backpack. Available in black, blaze orange, and lime. Cannot specify color.