Large Field of View with Multi-Coated Lens: Engineered with advanced anti-reflective lens coatings, this sight maximizes light transmission for unmatched clarity. The 0.95'' × 0.75'' window delivers a greater sight picture, ensuring quicker follow-up shots. Side-Loading Battery: Effortless battery replacement without removing the optic ensures hassle-free re-zeroing. A high-end CR1632 battery offers easy accessibility while maintaining steady performance. 3 MOA Dot + 32 MOA Circle: Switching between dot-and-circle, dot-only, or circle-only reticles, you can tailor your display options to any viewing preferences. The sharp and bright dot-and-circle reticle provides a cutting-edge viewing experience. Most Common Footprint: By adopting the de facto industry standard (Ruggedized Miniature Reflex, or 407c/507c footprint), Osight C is a versatile addition to many full-size and compact pistols. Osight picatinny mounts add even more possibilities with both high and low options that will work with most rifle applications. Motion Sensor Function: Motion sensor activates Osight C at the slightest movement, and powers down after 3 minutes of inactivity to conserve battery. *Designed for Responsible Use: Built with safety, reliability, and responsible handling in mind.