CT MOTION(TM) Sensor - Detects movement of the firearm and automatically turns the reflex sight on. Sight powers off after 2 minutes of being stationary. CT RADIANT(TM) ambient light sensor - The ambient light sensor automatically adjusts the aiming dot's brightness to the surrounding lighting condition. CT RAD(TM) Mounting Pattern - Fits most full size handguns and is compatible with the DocterA(R) footprint. Recessed optic lens for increased durability. Adjustable windage and elevation - aerospace aluminum construction - IPX4 water resistant - Rubber sight cover included - Top access battery location. (1) CR1632 battery included - 20,000 hours of runtime (Red)/7,000 hour Mfg: Crimson Trace Corporation