The device (Sword Art Online: Fatal Bullet)

In the house of the protagonist, (where else ifinal worth it.) there is a terminal in it, and set set devices all the cases. (Gray like this terminal.)
If anything, you can read in the database, there is about FSE-FSE-FSE, will tell. (I'm only after 1st passing found out that the device do you need to BUY and not to, because they do not pay attention to the difference between external terminals of weapons and devices.)