The Romeo-MSR and Juliet3 Micro Combo Kit features a 1x20mm compact red dot & 3x22mm micro magnifier with SpectraCoat lens coating, Picatinny mount type, water and fog proof, 2 MOA red dot and aluminum construction. Brand Sig Sauer Electro-Optics Category Red Dot Scopes Model Romeo-MSR/Juliet3 Micro Series Combo Finish Black Magnification 1x / 3x Material Aluminum Proofs Fog / Waterproof Reticle Red Dot Objective 20mm / 22mm Windage Adjustment 100 MOA Battery CR1632 Length 5.90" Adjustment Size 1 MOA Brightness Settings 10 Day / 2 Night Dot Size 2 MOA Elevation Adjustment 100 MOA Exit Pupil Diameter 7mm Eye Relief 2.55" Field of View 7.40 Degrees Optic Coating SpectraCoat Windage Elevation Adjustable