LARGE OPEN REFLEX SIGHT. CT RAD MAX Pro. 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. M1913 Pic Rail Mount - Fits most MIL-SPEC Pic Rails - M1913 low rise and high rise Pic Rail mount included. Recessed optic lens for increased durability. Adjustable windage and elevation - aerospace aluminum construction - IPX7 waterproof - Rubber sight cover included - Top access battery location. (1) CR2032 battery included - 50,000 h Mfg: Crimson Trace Corporation