The SpeedDot 135 red dot sight is a sight that holds up to brutal punishment. It delivers a crisp, perfectly round, bright, adjustable brightness dot, it’s waterproof and fogproof and has optics with fully coated lenses for a bright, clear sight picture. It has a rugged 35mm main tube that is nitrogen filled and sealed to be waterproof and fogproof. A huge field-of-view provides fast target acquisition and the fully coated lenses offer a crisp, clear, non-reflective sight picture. Features 11 brightness settings. Each SpeedDot includes Weaver-style mounting rings and an easy-to-find #2032 camera battery with a 200+ hour life at the highest setting. Fact is, if the SpeedDot is fast and positive enough for IPSC speed shooting competition, you can imagine how quick it’ll zero in on a deer or turkey.