Konus KonusPro-275 Hunting 3-10x 44mm Rifle Scope - Dual Illuminated 275 Ballistic Dot - The exclusive ballistic reticle, coinciding with the most popular black powder loads today, provides you with a system of reference lines for exact aiming points from 75 to 275yds. Lateral hash marks allow for precise leads of moving targets as well as compensating for strong crosswinds. The glass engraved ballistic reticle is unbreakable, and the 44mm objective lens coupled with the dual illuminated red & blue center dot is ideal for shooting into dark targets, as well as during the critical dawn and dusk time of day. The multi-coated optics are clear and bright. Water, Fog, and Shock proof Nitrogen filled Coated lenses Cr2032 batttery