Coghlan’s Four Function Whistle is a useful multi-function device that is excellent for reading a map and orienteering.

The whistle features 4 key functions that are helpful in navigating the outdoors.

Compass
Loud whistle
Thermometer
Magnifier
The Four Function Whistle also includes a convenient clip to attach to a zipper, belt, lanyard, or backpack.

A compass is ideal for reading a map or orienteering.
The whistle is loud enough to alert others of your presence.
Thermometer accurately tells the temperature in both °F and °C
A magnifier is useful for reading maps or viewing details on items.
Easily attaches to a zipper for quick and easy access.
Mixed colors: black, blaze orange and lime