TruGlo Tru Brite Open Dot Sight 34mm Multi-Reticle Black. The TruGlo TG8380BN Tru-Brite Red Dot Sight has 4 reticle choices to dramatically increase targeting speed in short range shooting situations adjustable rheostat for brightness control unlimited eye relief click windage and elevation adjustment. This TruGlo Tru Brite Open Red Dot also includes anti-reflection coating on target side integrated Weaver-style mounting system and a 3V-CR2032 battery. Specifications for TruGlo Tru Brite Open Dot Sight: Manufacturer: TruGlo Color: Black Finish: Black Magnification: 1 x Objective Lens Diameter: 34 mm Illumination Color: Red Eye Relief: Unlimited Field of View Linear: 30 - 74 ft at 100 yds Battery Type: CR2032 Lithium Metal Water Resistance Level: Waterproof Fogproof: Yes Length: 3.48 in Condition: New Package Type: Box Magnification Type: Fixed Quantity: 1 Tube Diameter: 34 mm Red Dot Sights-Footprint: Not Applicable Mount Type: Weaver Gun Rail: Weaver Features of TruGlo Tru Brite Open Dot Sight Two choices of reticle color for contrast against any target / background Durable / compact design 34mm x 24mm window for ultra-fast target acquisition Unlimited eye relief Wide field of view Anti-reflective coating on target side Parallax free at 30 yards Integrated Weaver-style mounting system Package Contents: TruGlo Tru Brite Open Dot Sight TruGlo TG-TG8380BN: Tru Brite Open Dot Sight 34mm Multi-Reticle Black