Sig Sauer Romeo-MSR Gen II 1x20mm FDE Red Dot - 2 MOA Dot - The ROMEO-MSR Gen II provides a durable 1x aiming solution for civilians and armed professionals alike, with a crisp 2 MOA red dot emitter powered by a CR2032 battery that can be quickly replaced. Couple with motion-activated MOTAC technology, the ROMEO5 Gen II boasts a 40,000 hour runtime under standard usage. Featuring top mount ambidextrous controls that offer 10 daylight and 2 night vision settings, finding the optimal setting for your environment is quick and intuitive. Capable of withstanding some of the harshest conditions. See through Riser Mount. Ruggedized Industrial Design; Parallax-Free Optical Design; See-Thru Riser Mount; 12 Settings (10 Day + 2 NV); 40,000 Hour Runtime with CR2032 Battery; Rotary Illumination Dial; Dependable IPX7 Waterproof and Fog-Proof Performance;