Unless I’m missing a new release of the RMR….I have two RMR type sights and they both have the solar charging as well as the auto adjustment. I thought something was wrong with it when I first got it because the dot kept changing intensity when I would go into dark rooms and then light rooms. lol. Then I read the manual and found out why it was doing it. It actually worked. I just prefer to set my dot myself and keep it at that intensity. Mine also has batteries. So it can run off batteries or solar.