The RAD (Rapid Aiming Dot) and RAD Pro Electronic Sights are compact Open Reflex Sights for full size pistols. Featuring a 3 MOA round aiming dot the RAD will elevate your pistol’s performance instantly. Easily user-installed by utilizing an industry standard mounting interface they boast a high efficiency LED for years of use. – Top accessible battery compartment – Battery life: 40000 hours (4.5 Years) – Industry standard Docter mounting interface – Shock impact fog and vibration resistant design – Low-profile snag-free design – High efficiency LED for years of maintenance-free use – Large function buttons for brightness settings – Sleep function for auto shut-off