Ade Advanced Optics RD3-009 Red Dot Sights Waterproof guaranteed for 30 minutes under 1.7feet. Shockproof 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 5 MOA. 5 Illumination Settings Powered by a lithium CR2032 battery(Included)