Advanced, fiber optic/tritium aiming-point illumination speeds target acquisition in all light conditions. Battery-free, illuminated reticle automatically adjusts aiming point brightness to existing light conditions; provides ideal reticle-to-target contrast and extends shooting hours. Manual brightness override lets you adjust the brightness to your personal preference. Multi-layer coated lenses deliver superb clarity and light-gathering capacity without distortion. Variable power magnification with quick-focus eyepiece that gives exceptional edge-to-edge lens optical clarity. Mfg: Trijicon