Okay, let me just say first of all: THIS MOVIE IS VERY SCARY AND THIS IS THE SCARIEST MOVIE I HAVE EVER SEEN. In my opinion, this movie IS scarier than 'The Conjuring', 'The Exorcist', 'The Ring', 'Sinister' etc.
Second - violence: This movie is not that violent actually. The ending is kind of, though. That is the most violent scene in the movie. But then, there are bloody handprints, PG-9 level violence, except the ending, that is a PG-13. (I just made the PG-9 rating up)
Third - language: This movie has strong language. Some of them are said by the kid, but we only hear it from a man (It's kind of hard to explain). All bad language contain 2 f--k's, 1 w---e, 1 b---h, and more, which I don't actually remember.
Then - sexual content: This movie has NOTHING to do with that. Although, we see the parents chatting in bed, then kissing, but NOTHING sexual happens. Then, there is a scene where a woman is sexually assaulted, but it only lasts for 2 seconds.
Consumerism: An apple laptop is seen, and also, a man is seen with an iPhone, but we don't see the apple logo, it's just obvious.
Overall, this movie has PG-level, except the ending and all the terror and intense scenes. SHOULD be okay with 12+