Features: Enclosed Emitter Optic: With a fully enclosed system, Osight SE DPP offers unmatched protection against the elements, ensuring reliable performance in any environment. Large Field of View: Advanced anti-reflective lens coatings maximize light transmission for a clear sight picture, while the large 0.91" A- 0.71" window enables faster target acquisition and quicker follow-up shots. 2 MOA Dot & 32 MOA Circle: Switch between dot-and-circle, 2 MOA dot-only, or 32 MOA circle-only reticles for any shooting scenario. Enjoy sharp clarity and strong contrast for precise, confident aiming. DPP Footprint: DPP footprint for broad compatibility, easy installation, and a secure, repeatable mount - no adapters or modifications needed. Side-Loading CR1620 Battery: CR1620 battery offers easy accessibility while maintaining steady performance.