The ROMEO7 full-size red-dot sight provides the civilian and armed professional with a robust 1x aiming solution optimized for today's MSR platforms, regardless of caliber. The battery life lasts an amazing 62,500 hours (on medium setting) and the low AA battery compartment allows for quick battery replacement without having to remove the sight from the firearm. The high performance lens coating allows for not only excellent light transmission and zero distortion, but also allows for the highest possible dot brightness.