Ade Advanced Optics RD3-009-1 Red Dot Sights 5 MOA 5 Illumination Settings; Waterproof guaranteed for 30 minutes under 1.7feet Lenses are precision ground and polished to exacting geometries to virtually eliminate parallax and to provide a very clear, crisp sight picture Fully windage and elevation adjustable and lockable Lightweight Super Compact And Crystal Clear Powered by a lithium CR2032 battery(Included)