Description Sig Sauer Romeo8H 1X38 mm Rectangular Red Dot Sight, 1x38mm, Ballistic Circle Dot, M1913 Rail Interface Using advanced technology, the Sig Sauer Romeo8H 1X38 mm Rectangular Red Dot Sight offers superior precision and accuracy. With a Ballistic Circle Dot and M1913 Rail Interface, this red dot sight provides a highly versatile and reliable sight picture for a variety of shooting scenarios. With this sight, you can trust that your aim will be on point every time. Features Designed for modern MSR platforms and shotguns Ballistic Circle-Dot reticle options Users can select from 4 different integrated reticle options (Dot, Circle-Dot, Dot with Holds, Circle-Dot with Holds) 100,000+ hour battery life and the readily available CR123A battery is side loading for quick battery replacement. Unlimited eye relief to acquire aiming point and target, regardless of eye position behind sight. MOTAC (Motion Activated Illumination) powers up or down when sensing motion Uses an ultra-efficient red LED illumination for daylight visibility and extended runtime 1.535" Mount Height Strong, lightweight aircraft-grade 6061-T6 aluminum housing Waterproof, IPX-7 rated, and fog-proof.