Thinking about purchasing the Ray Ban Meta Smart Glasses for my 14yr old for Christmas however I do have some questions, can you guys help me?

So me and my wife are thinking of purchasing these for our 14yr old for Christmas since it looks like there are so many deals going on right now the price seems pretty good to take advantage of. But I wanted to know the following,

1) I see he needs to have a Facebook account in order to use them. How much does he need to use Facebook in order for him to enjoy these? He does not have Facebook and we don't him to have Facebook. So wasn't sure if this will impact usages. We are aware that an account needs to be created.

2) I see there are so many versions of these glasses. What version is best to get for him. He does not need or use glasses currently.

3) realistically how is the battery life?

4) is a new pair coming in a few months?