Sig Sauer Romeo Pro 4XT 1x Red Dot - Ballistic Circle Dot - Sig Sauer's ROMEO4XT-PRO is a feature-rich red dot sight designed in collaboration with professional end-users. This sight is powered by an AAA battery with a long-lasting runtime of 50,000 hours, and the battery cap is tethered to prevent loss during battery changes in high-pressure situations. In response to industry professionals' feedback, the power and illumination control has been moved to the 12 o'clock position, making the sight ambidextrous and reducing the risk of snagging on plate carriers or chest rigs. The ROMEO4XT-PRO is designed to be used with night vision devices, with a dedicated night vision override switch for quick transition and Sig's exclusive D.A.R.C. (Dark Adaptive Reticles & Coatings) Technology that enhances performance with GEN 3+ night vision. This sight offers multiple reticle options, including a simple dot, a 3-dot bullet drop compensation, a dot in a ring, and more. Additionally, the ROMEO4XT-PRO is built to last, with a housing precision-machined from solid aluminum, providing durability against recoil and impacts, and an IPX8 waterproof rating. Powered by common AAA battery w/ 50,000 hour runtime; Tethered Battery Cap: Ensures you won't lose the cap during battery changes in high-stress situations; Power/Illumination Controls in 12 o'clock position: Allows ambidextrous operation and reduced risk of snagging on equipment; Night vision compatibility: 3 night vision brightness settings, night vision override switch, special lens coatings and reticle brightness settings for optimal performance with GEN 3+ night vision devices; Multi-segment reticle: allowing the user to choose between a simple dot reticle, a 3-dot bullet drop compensation reticle, a dot in the middle of a ring, or a 3-dot bullet drop compensation reticle in the middle of a ring; Durable Construction: precision CNC machined housing from solid and IPX8 waterproof rating;