FREE 7-14 DAY DELIVERY Operation Instructions: For otimum performance and to prevent damage to this precision Instrument, carefully all instructions. Features: Diamond coat, scratch resistant lens for maximum field-of-view, brightness, and resolution Extremely durable aluminum housing 8 illumination settings for red and green dot Unlimited eye relief 1/2MOA click elevation/windage adjustment Wide field-of-view Blackened lens edges Specifications: Magnification:1X Sight window:1.26mmx.98mm Elevation adjustment range:60 MOA 20 MOA per revolution of adjustment Sub tension of the aiming point:1.0 MOA Dot Operating Temperature Range:-20°F to +120°F(-29°C to+49°C) Storage Temperature Range:-40°F to++160°F(-40°C to +71°C) Power Supply: One(1)3V CR123A battery(not included) Dimensions:(LxWxH)91.4mmX57.1mmX61.2mm