For handguns and shotguns and rifles and paintball guns and this red dot sight has the power and construction to last through any shooting application. Features include unlimited eye relief and a wide field of view and an 11 position rheostat for brightness control. Click windage and elevation adjustments. Limited lifetime warranty. Technical Information: Tube Diameter: 30mm Objective Diameter: 42mm Mount: Weaver-style Battery Type and Number: 2032 (3V) Batteries Included Warranty: Limited lifetime Notes: 11 brightness settings unlimited eye relief fogproof/waterproof/shock resistant fingertip elevation and windage adjustment