Tactical whistle of urgency and distress, including 7 functions:

Very powerful signaling whistle.
Compass
Thermometer (-20-50)
Mirror reflective signal of survival (determination of the location using the reflection of the sun to show your position to the search and rescue personnel)
Magnifying lighter fire or reading map (To light the fire in the field, possibility of using the principle of the sun, magnifying the concentrated refraction of the sunlight to produce a fire / read a map)
Powerful LED lamp (map reading, Morse message, etc.)
Storage compartment for various accessories or useful info (your data such as name and address, blood type, etc.)
Nylon strap (100cm)
Powered by 2 x CR 2016 batteries