PRESMA Rifle Scope 4-16X40 Eagle Series, Hunting Scope, Tactical Scope, Front AOL, RGB tri-Illuminated, RXR Reticle, Level bubble, Electronic button switch, Adjustment memorable function Superior Multi-Coated lenses for reduction of glare and reflection, while maximizing light transmission for ultimate image brightness and clarity from edge to edge Red, Green and Blue illuminated color Mil-Dot Range Finding reticle with quick-reaching button operations and last active color memory function, along with auto off to save battery life QTA (Quick Tactical Adjustment) tactical turrets with precise 1/4" MOA click value for wind and elevation adjustment Constructed with single piece of premium Aircraft-Grade Aluminum Alloy with 1" tube diameter body, Cardan joint design, hardened anodized black matte finish for its durability LIFETIME WARRANTY Argon purged scope, completely sealed with o-ring, making scope shockproof, waterproof, and fog proof