"The SIG SAUER Romeo5 Gen II Elite Red Dot Sight with Quad Ballistic Circle Dot 2.0 Reticle features a streamlined design with improved windage/elevation controls, additional brightness settings, and a 4-in-1 reticle that gives you the right aim point for any scenario. The Romeo5 Gen II provides an enhanced user interface with recessed windage and elevation dials while maintaining quick access to zero adjustments. The unit also features 2 additional daytime brightness settings in addition to the 2 night vision settings to allow for better brightness control in all conditions. And the Quad Ballistic Circle Dot 2.0 reticle allows you to toggle between 4 selectable reticle options. Pick between a 1 MOA dot, 1 MOA dot with ballistic holds, 1 MOA dot with 65 MOA circle, or 1 MOA dot with 65 MOA circle and ballistic holds. The holds subtend for 5.56 NATO and 7.62 NATO cartridges. The Romeo5 Gen II comes with a 1.41"" absolute co-witness mount. Other features include a multi-coated, high-performance mangin lens; 12 brightness settings; top illumination settings; dependable IPX7 waterproof and fogproof performance; and 40,000 hours of run time with Motac technology. Quad Ballistic Circle Dot 2.0 4-in-1 reticle Improved windage and elevation controls 10 daylight brightness settings & 2 night-vision settings Multi-coated, high-performance mangin lens Dependable IPX7 waterproof and fogproof performance Motac technology powers up the unit when it senses motion Up to 40,000 hours run time with 1 CR2032 battery Absolute co-witness 1.41"" mount allows use of iron sights"