*3 MOA Red Dot Reticle for Fast Acquisition, 23mm x 17mm Multi-Coated Objective Lens, Push Button Digital Brightness Controls, 10 Brightness Settings*Unlimited Eye Relief, Auto Shutoff Conserves Battery Life, Waterproof (O-Ring Sealed Design)*Compatible with optic ready pistols, common lug and bolt pattern for maximum compatibility (Vortex, EOtech, Docter, Insight, Meopta, etc.)3-MOA Red Dot reticle for fast acquisition. 23mm x 17mm multi-coated objective lens. Digital push-button brightness controls. 10 brightness settings. Compatible with optic-ready pistols. Common lug and bolt pattern for maximum compatibility (Vortex, EOTech, Docter, Insight, Meopta, etc.) (Models: TG8100B, TG8100B1, TG8100BM, and TG8100G). RMR-compatible mounting system (Model TG8200B). Locking windage and elevation adjustments. Ultra-lightweight (just over 1 oz). CNC-machined from aircraft-grade aluminum. Unlimited eye relief. Auto-off feature preserves battery life. Water-resistant (sealed o-ring design). Picatinny / Weaver-style rail mount included