Better yet, the same LED projects both reticles, so no re-zeroing is necessary. When focusing on the target, the size of the reticle will change based on the distance between your eyes and objective lens.Parallax free optical design, with unlimited eye relief. Minimized obstruction of vision with push button controls and a streamlined housing design. Switchable circle/dot and red dot reticles. Always on unless manually turned off. Solar cell and high capacity battery provide dual power supplies. The item "HOLOSUN Hs510c 2 MOA Open Reflex Circle Dot Solar Power Holographic Red Sight" is in sale since Thursday, September 2, 2021. This item is in the category "Sporting Goods\Hunting\Scopes, Optics & Lasers\Red Dot & Laser Scopes". The seller is "shootingsurplus" and is located in Ruston, Louisiana. This item can be shipped to United States.