New Tritium Nite Self-Luminous Ring

The Tritium Nite Self-Luminous Ring contains three small glass tubes containing a small amount of gas - tritium (radioactive isotope of hydrogen), the fluorescence generated, can cause your attention within about 10 meters in 30 feet. Does not require batteries, which contain material gas can shine for 25 years! you can use the 100 meters underwater, can be used in harsh environments wilderness survival. wear the ring, camping at night when they are not afraid of can not find what you want it!