M5s style Dot Sight2 MOA red dot for precision and fast target acquisition Battery type: AAA battery 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 10 brightness settings: 3 night