C&H Precision Weapons ERD-2 1x22mm Automatic Dimming Red Dot 3 MOA Black. It offers the ability to adjust the brightness instantly and automatically based on the changes in light picked up by the front facing target sensor. This dimming can also be manually set. It utilizes a picatinny rail mount for widespread compatibility. Available in red dot with a 3 moa dot. Specifications for C&H Precision Weapons ERD-2 1x22mm Automatic Dimming Red Dot: Manufacturer: C&H Precision Weapons Color: Black Magnification: 1 x Objective Lens Diameter: 22 mm Reticle: 3 MOA Illumination Color: Red Eye Relief: 95 mm Adjustment Click Value: 1/10 Mil Rad Battery Type: Lithium Metal CR2032 Weight: 2 lb Quantity: 1 Tube Diameter: 30 mm Red Dot Sights-Footprint: Not Applicable Mount Type: Picatinny Gun Rail: Picatinny Features of C&H Precision Weapons ERD-2 1x22mm Automatic Dimming Red Dot 10 Levels of brightness (1&2 are night vision compatible) Motion Control (shake awake) Shockproof (Rated for All rifle ammo) Waterproof (ipx7 1 meter for 30 mins) 50000 Hours Battery Life CNC Machined One-Piece Body Package Contents: C&H Precision Weapons ERD-2 1x22mm Automatic Dimming Red Dot C&H Precision Weapons RD-ERD-2-RD: ERD-2 1x22mm Automatic Dimming Red Dot 3 MOA Black