In fact, I believe that having it could make a life or death difference.
It's a tool used by the military for decades now.
But getting your hands on one required connections high-up in the Military and thousands of dollars.
Until about a week ago.
And since then I've managed to get my hands on some directly from the manufacturer, and want to give it to you for a fraction of what you'd pay anywhere else.
In fact, you'll pay less than 1/10th of what you'd pay a government contractor (if you even had the connections to do that)