YOU SAID:

I'm not entirely sure what this does

INTO JAPANESE

私はこれが何をするのか全くわからない

BACK INTO ENGLISH

I have no idea what this will do

INTO JAPANESE

これがどうなるかわかりません。

BACK INTO ENGLISH

I do not know what will happen.

INTO JAPANESE

何が起こるか分かるわ

BACK INTO ENGLISH

I know what will happen.

INTO JAPANESE

何が起こるか分かるわ

BACK INTO ENGLISH

I know what will happen.