The SPARC SOLAR harnesses the power of the sun for up to 150,000 hours of battery life. Auto D-TEC technology automatically switches from solar to battery power when the sun can t power the dot to your choice of 10 daytime illumination settings and two night-vision compatible settings. Its daylight bright, 2 MOA dot delivers a clear, precise point of aim, and is motion activation capable for worry-free activation in high stress situations. Product Features Dot Color: Bright Red Dot Size: 2 MOA Eye Relief: Unlimited Adjustment Graduation: 1 MOA Travel Per Rotation: 42 MOA Max Elevation Adjustment: 100 MOA Max Windage Adjustment: 100 MOA Parallax Setting: Parallax Free Length: 2.6 inches Weight: 5.9 oz Included in Box Tethered Lens Covers T10 Torx Multi-Tool Low Mount Lower 1/3 Co-Witness Mount Lens Cloth CR2032 Battery