The ROMEO1PRO elevates durability and performance in the realm of miniature open-reflex red dot sights. Its housing, made from aircraft-grade aluminum, guarantees corrosion resistance even in the toughest conditions. An upgraded point-source emitter enhances brightness across 12 settings, ensuring optimal visibility day or night. The molded glass aspheric lens, with improved high-performance coatings, offers superior light transmittance and zero distortion, enabling rapid and accurate target acquisition. For added ruggedness, the ROMEO1PRO comes with a protective shroud, enhancing its durability and resilience. Features: The ideal sighting solution for the modern semi-automatic pistol Molded glass aspheric lens with high-performance coatings for superior light transmittance and zero distortion 6 MOA red dot with multiple brightness settings for rapid target engagement under a full range of lighting conditions TruHold lockless zeroing system that utilizes twin adjustment springs designed to endure handgun recoil and return to zero shot after shot New point-source emitter provides exceptional brightness with 12 settings (10 daytime/2 NV), and 20000+ hr of runtime MOTAC (motion activated illumination system) powers up when it senses motion and powers down when it does not Aircraft grade CNC aluminum housing ensures a lifetime of reliable service Dependable waterproof (IPX7 rated for complete water immersion up to 1 m) and fogproof performance Ruggedized protective steel shroud included for extreme durability Easy access battery compartment Sig Sauer electro-optics infinite guarantee and Sig Sauer electronic component limited 5 years warranty 10 daytime/2 NV illumination settings 20000 hr run time