Titanium Tritium Keychain Self-Illuminating 25year

The luminous principle of the tritium gas tube is based on the radioactive properties of tritium. Tritium is an isotope of hydrogen that releases high-speed electrons through beta decay. These electrons collide with gas molecules in the glass tube during flight, causing the gas molecules to become ionized. When these ionized gas molecules are activated by fluorescent substances in the tritium gas tube, they release photons, thereby producing visible lightMaterial: Titanium Alloy, Tritium Gas TubeGlow does not require any energy sourceLifespan: 20-25 yearsSize: 0.3×0.3×1.4 inchPackage list: 1 keychain