Tubeless design with 33mm reflex lens aperture provides a wide field of view, suitable for normal and rapid-firing shooting of moving targets. Features ---Durable all metal construction ---Windage and elevation adjustable (tools included) ---Red and green reticles with four patterns ---Adjustable reticle brightness ---Lightweight, weatherproof, and shockproof ---Integrated mount for standard Picatinny / Weaver rails Specifications ---Dimensions: 3.35" (length) x 2" (width) x 2" (height) ---Weight: 130g (4 oz) ---Field of View: Unlimited ---Reticle Type: Circle dot, cross, 10 MOA, and 3 MOA ---Color: Black ---Power: 1 x CR2032A (included) Items Included ---One (1) HD101 holographic sight (Black) ---Five (5) CR2032 batteries ---Two (2) hex wrenches ---One (1) cleaning cloth ---One (1) storage box.