2 MOA red dot for precision and fast target acquisition; Battery life: 50,000 hours (over 5 years) of constant operation with one battery on setting 8; Battery type: CR2032 battery (included); AR15 Ready includes 39 mm Spacer and LRP (Lever Release Picatinny) Mount - Integral Picatinny-style base allows easy attachment to any rail; Flip-up lens covers - front is solid, and rear is transparent - allowing the user to shoot with both eyes open and lens caps closed in an emergency situation; Advanced optical lenses for enhanced light transmission and ultimate dot clarity; Reinforced protection of the turrets for even greater ruggedness; Hard anodized non-reflective surface; 12 brightness settings: 1 off position, 4 night vision compatible settings, and 8 daylight settings; Submersible to 80 feet (25 meters)