Mil-Dot range estimating reticle for most optimal aiming and shooting performanceCompletely sealed and nitrogen filled 100% shockproof waterproof and fogproofLimited lifetime warrantyMagnification: 2X - 6XTube Diameter: 1 InchObjective Diameter: 32mmField of View @ 100 yards: 54" - 21"Eye Relief: 3.3" - 3.0"Exit Pupil: 7.0mm - 3.6mmClick Value @100 yards: 1/4"Length: 213mmWeight: 14.4 ozParallax Setting: 3 Yds - InfinityBatteries: CR1620 3V