NukAlert Key Chain: You never know what you might run into during a collapse, especially if international tensions are involved. A meter which is always running and alerts you when approaching dangerous radioactivity could save your life. Though most highly volatile gamma radiation falls to safe levels after two weeks of initial exposure, you should still be concerned about consumption of affected substances. Irradiated water sources, for instance, are undetectable to the eye, and without a device like the NukAlert, you would never know what you were drinking. The device is very small, and is also designed to be immune against an Electromagnetic Pulse.