The Holosun AEMS PRO X2 enhances the AEMS platform by improving accuracy through an advanced optical system that reduces parallax by 50%. AEMS X2 PRO also introduces a forward-facing light sensor creating a smarter AUTO Mode that improves dot contrast in dynamic lighting conditions while in AUTO Mode.AEMS X2 PRO also includes a new anti-reflective device and an all-new four post, lower 1/3 co-witness mount. AEMS X2 PRO remains backwards compatible with original AEMS mounts.Shake Awake(TM) Technology w/ Last Setting Recall Multi-Reticle System(TM)(MRS): 65 MOA Circle & 2 MOA Dot; 2 MOA Dot; 65 MOA CircleUp to 50,000 Hour Battery LifeSolar Failsafe(TM)Included :1x AEMS-PRO-X2-RD Optic1x 1.63 in Optic Mount1x Anti-Reflection Device Front Lens Insert1x Clear Front Lens Insert1x Multi-tool1x Wrench1x Cleaning Cloth